Electronic device

ABSTRACT

An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outside surface being convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof.

RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/869,314, filed on Jan. 12, 2018, which claims priority to U.S.Provisional Application Ser. No. 62/565,173, filed Sep. 29, 2017, whichis herein incorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to an electronic device. Moreparticularly, the present disclosure relates to an electronic devicewith at least one optical lens assembly.

Description of Related Art

With rapid developments of technologies, the application ofphotographing modules is becoming wider and wider, and the applicationtechnologies of three-dimensional space observation are alsoincreasingly mature. Conventional three-dimensional space identificationtechnologies are mostly limited to two-dimensional images, and canachieve three-dimensional spatial analysis functions with algorithms,however, when information of three-dimensional space of information issimplified into the two-dimensional space image, it will always resultin information gaps, and limit restore results of calculation.

Thus, a three-dimensional image capture technology is developed, whichprojects light with particular characteristics (such as specificwavelengths and patterns, etc.) onto an object, the light is reflectedby the object, and then received by a lens assembly and be calculated soas to obtain the distance between each position of the object and thelens assembly, and determine information of the three-dimensional image.The technology is widely applied to electronic device, such assomatosensory games, virtual reality, augmented reality,three-dimensional image capturing, dynamic capturing, face recognitions,driving assisting systems, various kinds of smart electronic products,multi-lens devices, wearable devices, surveillance equipments, digitalcameras, identification systems, entertainment devices, sports devicesand intelligent home assisting systems, presently.

Nowadays, three-dimensional image capturing technologies mostly adoptsinfrared in a specific wavelength band to reduce interference so as toachieve more accurate measurements. However, with applications, such asface recognition and augmented reality, being used in portable devices,such as smart phones are gradually developed, the sensing module thereofneeds to be more precise and compact, but conventional technologies arestill difficult to achieve the balance between the two.

SUMMARY

According to one aspect of the present disclosure, an electronic deviceincludes at least one optical lens assembly. The optical lens assemblyincludes four lens elements, and the four lens elements are, in orderfrom an outside to an inside, a first lens element, a second lenselement, a third lens element and a fourth lens element. The first lenselement has an outside surface being convex in a paraxial regionthereof. The second lens element has an inside surface being convex in aparaxial region thereof. The fourth lens element has an inside surfacebeing concave in a paraxial region thereof, wherein at least one of anoutside surface and the inside surface of the fourth lens elementincludes at least one critical point in an off-axis region thereof. Whena measurement is made in accordance with a reference wavelength as ad-line, an Abbe number of the first lens element is Vd1, an Abbe numberof the second lens element is Vd2, an Abbe number of the third lenselement is Vd3, an Abbe number of the fourth lens element is Vd4, afocal length of the optical lens assembly is fd, a focal length of thethird lens element is fd3, and a focal length of the fourth lens elementis fd4, the following conditions are satisfied:0.65<Vd1/Vd2<1.54;0.65<Vd1/Vd3<1.54;0.65<Vd1/Vd4<1.54;10.0<Vd1<38.0; and0.69<|fd/fd3|+|fd/fd4|.

According to one aspect of the present disclosure, an electronic deviceincludes at least one optical lens assembly. The optical lens assemblyincludes four lens elements, and the four lens elements are, in orderfrom an outside to an inside, a first lens element, a second lenselement, a third lens element and a fourth lens element. The second lenselement has an outside surface being concave in a paraxial regionthereof and an inside surface being convex in a paraxial region thereof.The third lens element has an outside surface being concave in aparaxial region thereof. The fourth lens element has an outside surfacebeing convex in a paraxial region thereof and an inside surface beingconcave in a paraxial region thereof, wherein the outside surface of thefourth lens element includes at least one critical point in an off-axisregion thereof. At least one of the third lens element and the fourthlens element has positive refractive power, and the other one hasnegative refractive power. When a measurement is made in accordance witha reference wavelength as a d-line, an Abbe number of the first lenselement is Vd1, an Abbe number of the second lens element is Vd2, anAbbe number of the third lens element is Vd3, an Abbe number of thefourth lens element is Vd4, a focal length of the optical lens assemblyis fd, a focal length of the third lens element is fd3, and a focallength of the fourth lens element is fd4, the following conditions aresatisfied:0.65<Vd1/Vd2<1.54;0.65<Vd1/Vd3<1.54;0.65<Vd1/Vd4<1.54; and0.69<|fd/fd3|+|fd/fd4|<2.65.

According to one aspect of the present disclosure, an electronic deviceincludes a sensing module, which includes a projection apparatus and areceiving apparatus. The projection apparatus includes an optical lensassembly and at least one light source, wherein the optical lensassembly includes four to six lens elements, and the light source isdisposed on an inside conjugation surface of the optical lens assembly.The receiving apparatus includes an optical lens assembly and an imagesensor, wherein the optical lens assembly includes four to six lenselements, and the image sensor is disposed on an inside conjugationsurface of the optical lens assembly. The light source of the projectionapparatus is projected on a sensed object and is received by thereceiving apparatus after a reflection, and is imaged on the imagesensor. When a measurement is made in accordance with a referencewavelength as a d-line, at least six lens elements of the lens elementsof the optical lens assembly of the projection apparatus and the lenselements of the optical lens assembly of the receiving apparatus haveAbbe numbers smaller than 38. In the optical lens assembly of each ofthe projection apparatus and the receiving apparatus, an axial distancebetween an outside surface of one of the lens elements closest to theoutside and an inside surface of one of the lens elements closest to theinside is TD, and the following condition is satisfied:1 mm<TD<5 mm.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 is a schematic view of an electronic device according to the 1stembodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 1stembodiment;

FIG. 3 is a schematic view of an electronic device according to the 2ndembodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 2ndembodiment;

FIG. 5 is a schematic view of an electronic device according to the 3rdembodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 3rdembodiment;

FIG. 7 is a schematic view of an electronic device according to the 4thembodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 4thembodiment;

FIG. 9 is a schematic view of an electronic device according to the 5thembodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 5thembodiment;

FIG. 11 is a schematic view of an electronic device according to the 6thembodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 6thembodiment;

FIG. 13 is a schematic view of an electronic device according to the 7thembodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 7thembodiment;

FIG. 15 is a schematic view of an electronic device according to the 8thembodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 8thembodiment;

FIG. 17 is a schematic view of an electronic device according to the 9thembodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 9thembodiment;

FIG. 19 is a schematic view of an electronic device according to the10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 10thembodiment;

FIG. 21 is a schematic view of an electronic device according to the11th embodiment of the present disclosure;

FIG. 22 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 11thembodiment;

FIG. 23 is a schematic view of an electronic device according to the12th embodiment of the present disclosure;

FIG. 24 shows spherical aberration curves, astigmatic field curves and adistortion curve of the electronic device according to the 12thembodiment;

FIG. 25 is a schematic view of critical points according to the 1stembodiment of FIG. 1;

FIG. 26A is a schematic view of a sensing module of an electronic deviceaccording to the 13th embodiment of the present disclosure;

FIG. 26B is a schematic view of an appearance of one side of theelectronic device according to the 13th embodiment of the presentdisclosure;

FIG. 26C is a schematic view of an appearance of the other side of theelectronic device according to the 13th embodiment of the presentdisclosure;

FIG. 27A is a schematic view of an appearance of the using state of anelectronic device according to the 14th embodiment of the presentdisclosure;

FIG. 27B is a schematic view of a sensing module of the electronicdevice according to the 14th embodiment of the present disclosure; and

FIG. 28 is a schematic view of an electronic device according to the15th embodiment of the present disclosure.

DETAILED DESCRIPTION

An electronic device includes at least one optical lens assembly, whichcan be applied to an infrared band, especially for the application ofinfrared projection and reception. Thus, it is favorable for adapting tothree-dimensional image capturing technologies by obtaining highprecision of projection ability and high image quality and alsomaintaining compactness.

The optical lens assembly can include four to six lens elements, so thatit is favorable for obtaining higher precision of projection ability andhigher image quality, and also maintaining compactness of the opticallens assembly. Preferably, the optical lens assembly can include fourlens elements, which are, in order from an outside to an inside, a firstlens element, a second lens element, a third lens element, and a fourthlens element.

The first lens element can have an outside surface being convex in aparaxial region thereof, so that it is favorable for reducing theincident angle of the light from wide field of view so as to beapplicable to the design of wide field of view in the optical lensassembly. The first lens element can have positive refractive power, sothat the demand of compact size can be obtained by reducing the totaltrack length of the optical lens assembly. The first lens element canhave an inside surface being concave in a paraxial region thereof, sothat the generation of astigmatism can be reduced.

The second lens element can have an outside surface being concave in aparaxial region thereof, so that it is favorable for increasing field ofview by arranging sufficient space between the first lens element andthe second lens element. The second lens element can have an insidesurface being convex in a paraxial region thereof, so that it isfavorable for correcting off-axis aberrations by adjusting the path ofexiting light. The second lens element can have positive refractivepower, so that it is favorable for reducing spherical aberrations bybalancing the distribution of positive refractive power of the opticallens assembly.

The third lens element can have an outside surface being concave in aparaxial region thereof, so that off-axis aberrations can be reduced.The third lens element can have positive refractive power, so that thepositive refractive power of the optical lens assembly can be diverged,which can be favorable for avoiding excessive spherical aberrationsgenerated by the optical lens assembly during the total track length isreduced, and also favorable for reducing the sensitivity. The third lenselement can have an inside surface being convex in a paraxial regionthereof, so that it is favorable for lessening the stray light byreducing the surface reflection of light.

The fourth lens element can have an outside surface being convex in aparaxial region thereof, so that it is favorable for enhancing the imagequality in a peripheral region by correcting field curvature in theoff-axis region thereof. The fourth lens element can have an insidesurface being concave in a paraxial region thereof, so that the backfocal length and the total track length can be reduced. Furthermore, atleast one of the outside surface and the inside surface of the fourthlens element can include at least critical point in an off-axis regionthereof, so that it is favorable for correcting off-axis aberrations,and also favorable for reducing the surface reflection by adjusting theincident angle and exiting angle of light in a peripheral region. Theoutside surface of the fourth lens element can include at least onecritical point in the off-axis region thereof which can further correctoff-axis aberrations. The inside surface of the fourth lens element caninclude at least one critical point in the off-axis region thereof so asto further reduce the surface reflection of light in a peripheralregion.

Furthermore, one of the third lens element and the fourth lens elementcan have positive refractive power, the other one thereof can havenegative refractive power. Therefore, it is favorable for reducing thegeneration of aberrations by complementary effect of the third lenselement and the fourth lens element.

One of the outside surface and the inside surface of each of the firstlens element, the second lens element, the third lens element and thefourth lens element can be concave in a paraxial region thereof, and theother one thereof can be convex in a paraxial region thereof. Therefore,it is favorable for obtaining compactness and increasing the opticaleffective region of an inside conjugation surface.

When a measurement is made in accordance with a reference wavelength asa d-line, an Abbe number of the first lens element is Vd1, an Abbenumber of the second lens element is Vd2, an Abbe number of the thirdlens element is Vd3, and an Abbe number of the fourth lens element isVd4, the following conditions are satisfied: 0.65<Vd1/Vd2<1.54;0.65<Vd1/Vd3<1.54; and 0.65<Vd1/Vd4<1.54. Therefore, it is favorable forcorrecting aberrations by matching the materials of the lens elements.Especially, correction of chromatic aberrations is not that importantwhen the optical lens assembly is applied to the infrared band, so thatthe complexity thereof can be reduced, and it is favorable forcorrecting other kind of aberrations and reducing the size thereof so asto obtain compact optical lens assembly with high image quality.Preferably, the following conditions can be satisfied:0.70<Vd1/Vd2<1.44; 0.70<Vd1/Vd3<1.44; and 0.70<Vd1/Vd4<1.44. Morepreferably, the following conditions can be satisfied:0.75<Vd1/Vd2<1.35; 0.75<Vd1/Vd3<1.35; and 0.75<Vd1/Vd4<1.35. In detail,the Abbe numbers are calculated by Vd=(Nd−1)/(NF−NC), wherein Nd is therefractive index measured with a wavelength as helium d-line (587.6 nm),NF is the refractive index measured with a wavelength as hydrogen F-line(486.1 nm), and NC is the refractive index measured with a wavelength ashydrogen C-line (656.3 nm).

When the measurement is made in accordance with the reference wavelengthas the d-line, the Abbe number of the first lens element is Vd1, thefollowing condition is satisfied: 10.0<Vd1<38.0. Therefore, chromaticaberrations of the optical lens assembly can be reduced, and it isfavorable for correcting aberrations and obtaining compactness byutilizing the material with low Abbe number which has more excellentability of light refraction. Preferably, the following condition can besatisfied: 12.0<Vd1<34.0. More preferably, the following condition canbe satisfied: 14.0<Vd1<30.0.

When the measurement is made in accordance with the reference wavelengthas the d-line, a focal length of the optical lens assembly is fd, afocal length of the third lens element is fd3, and a focal length of thefourth lens element is fd4, the following condition is satisfied:0.69<|fd/fd3|+|fd/fd4|. Therefore, it is favorable for correctingoff-axis aberrations and reducing the total track length of the opticallens assembly by matching the refractive power of the third lens elementand the fourth lens element. Preferably, the following condition can besatisfied: 0.69<|fd/fd3|+|fd/fd4|<5.0. Thus, it is favorable foravoiding excessive spherical aberrations and reducing the size byavoiding excessive refractive power of the lens elements. Morepreferably, the following condition can be satisfied:0.69<|fd/fd3|+|fd/fd4|<2.65.

When the measurement is made in accordance with the reference wavelengthas the d-line, a refractive index of the first lens element is Nd1, thefollowing condition is satisfied: 1.650≤Nd1<1.750. Therefore, it isfavorable for correcting aberrations by arranging the material with highrefractive index so as to reduce the size of the optical lens assembly,especially for the infrared, which is hard to be refracted.

When the measurement is made in accordance with the reference wavelengthas the d-line, a sum of the Abbe numbers of the first lens element, thesecond lens element, the third lens element and the fourth lens elementis ΣVd, the following condition is satisfied: 40.0<ΣVd<155.0. Therefore,it is favorable for reducing the size and correcting aberrations byadjusting the arrangement of materials of the lens elements, especiallythe application in the infrared band which provides more obvious effect.Preferably, the following condition can be satisfied: 45.0<ΣVd<125.0.More preferably, the following condition can be satisfied:50.0<ΣVd<100.0.

When a central thickness of the second lens element is CT2, and acentral thickness of the fourth lens element is CT4, the followingcondition is satisfied: 0<CT2/CT4<1.04. Therefore, it is favorable forreducing coma aberrations by obtaining proper thicknesses of the secondlens element and the fourth lens element.

When a curvature radius of the outside surface of the first lens elementis R1, and a curvature radius of the inside surface of the first lenselement is R2, the following condition is satisfied: 0.32<R1/R2<1.64.Therefore, it is favorable for reducing astigmatism by arranging propersurface shape of the first lens element.

When the curvature radius of the inside surface of the first lenselement is R2, and a curvature radius of the outside surface of thefourth lens element is R7, the following condition is satisfied:0.25<R2/R7<4.8. Therefore, it is favorable for correcting off-axis fieldcurvature by arranging proper surface shapes of the first lens elementand the fourth lens element.

When the measurement is made in accordance with the reference wavelengthas the d-line, the focal length of the optical lens assembly is fd, thefocal length of the third lens element is fd3, the focal length of thefourth lens element is fd4, and a maximum of two values of |fd/fd3| and|fd/fd4| is max(|fd/fd3|, |fd/fd4|), and the following condition issatisfied: 0.43<max(|fd/fd3|, |fd/fd4|)<2.7. Therefore, it is favorablefor correcting distortion by matching the refractive power of the thirdlens element and the fourth lens element, and avoiding too weak orexcessive refractive power at the same time. Preferably, the followingcondition can be satisfied: 0.53<max(|fd/fd3|, |fd/fd4|)<1.8.

When the measurement is made in accordance with the reference wavelengthas the d-line, a focal length of the first lens element is fd1, a focallength of the second lens element is fd2, the focal length of the thirdlens element is fd3, and the focal length of the fourth lens element isfd4, the following condition is satisfied:0.38<(|1/fd1|+|1/fd2|)/(|1/fd3|+|1/fd4|)<1.5. Therefore, it is favorablefor correcting spherical aberration and distortion by properly adjustingthe distribution of the refractive power on the inside and the outsideof the optical lens assembly.

When an f-number of the optical lens assembly is Fno, the followingcondition is satisfied: 1.0<Fno<2.3. Therefore, when the optical lensassembly is applied to a projection apparatus, the illumination of anoutside conjugation surface thereof can be enhanced; when the opticallens assembly is applied to an image capturing apparatus or a receivingapparatus, the illumination on a peripheral region of the insideconjugation surface thereof can be enhanced.

When half of a maximum field of view of the optical lens assembly isHFOV, the following condition is satisfied: 5 degrees<HFOV<50 degrees.Therefore, it is favorable for avoiding excessive field of view whichwould cause too much aberrations, such as distortions. Preferably, thefollowing condition can be satisfied: 30 degrees<HFOV<50 degrees. Thus,it is favorable for avoiding too small field of view which would reducethe application range.

When an axial distance between an outside surface of one of the lenselements closest to the outside and an inside surface of one of the lenselements closest to the inside is TD, the following condition issatisfied: 1 mm<TD<5 mm. Therefore, it is favorable for widerapplication by maintaining the compact size of the optical lensassembly.

When an axial distance between the outside surface of the first lenselement and the inside conjugation surface of the optical lens assemblyis TL, and a maximum radius of the optical effective region of theinside conjugation surface of the optical lens assembly is IH, thefollowing condition is satisfied: 1.0<TL/IH<4.0. Therefore, it isfavorable for obtaining the balance between the enlargement of theoptical effective region of the inside conjugation surface andshortening of the total track length.

When the curvature radius of the inside surface of the first lenselement is R2, and when the measurement is made in accordance with thereference wavelength as the d-line, the focal length of the optical lensassembly is fd, the following condition is satisfied: 0<R2/fd<2.0.Therefore, it is favorable for obtaining the balance between the fieldof view and the total track length by adjusting the surface shape of thefirst lens element and the focal length of the optical lens assembly.

When a central thickness of the first lens element is CT1, and an axialdistance between the first lens element and the second lens element isT12, the following condition is satisfied: 0.80<CT1/T12<3.5. Therefore,it is favorable for adapting to design of wide field of view by matchingthe first lens element and the second lens element.

When the measurement is made in accordance with the reference wavelengthas the d-line, the focal length of the optical lens assembly is fd, andthe focal length of the third lens element is fd3, the followingcondition is satisfied: −2.5<fd/fd3<1.1. Therefore, the refractive powerof the third lens element would not be too strong so as to avoidexcessive spherical aberrations during reducing the total track length.Preferably, the following condition can be satisfied: 0<fd/fd3<1.1.Thus, it is favorable for decreasing the incident angle or the exitingangle of light on the inside conjugation surface by adjusting the lightpath through the positive refractive power of the third lens element.

The optical lens assembly can further include an aperture stop disposedon an outside of the second lens element. Therefore, it is favorable forobtaining the compactness of the optical lens assembly, and decreasingthe incident angle or exiting angle of light on the inside conjugationsurface. When an axial distance between the aperture stop and the insideconjugation surface of the optical lens assembly is SL, and an axialdistance between the outside surface of the first lens element and theinside conjugation surface of the optical lens assembly is TL, thefollowing condition is satisfied: 0.70<SL/TL<1.1. Therefore, it isfavorable for balancing the field of view and size of the optical lensassembly.

The optical lens assembly can be applied to the infrared band within awavelength ranged from 780 nm to 1500 nm so as to decrease theinterference from the visible light. Furthermore, the bandwidth of theinfrared band can be smaller than 40 nm, so that the sensing precisioncan be enhanced.

When a curvature radius of the inside surface of the fourth lens elementis R8, and when the measurement is made in accordance with the referencewavelength as the d-line, the focal length of the optical lens assemblyis fd, the following condition is satisfied: 0<R8/fd≤1.75. Therefore, itis favorable for reducing the back focal length by adjusting the surfaceshape of the fourth lens element and the focal length of the opticallens assembly.

The electronic device can include a projection apparatus, which caninclude the optical lens assembly and at least one light source, whereinthe light source can be disposed on the inside conjugation surface ofthe optical lens assembly. The optical lens assembly of the projectionapparatus can project the light from the light source onto the outsideconjugation surface. The light from the light source can be within theinfrared band (780 nm-1500 nm), the bandwidth of the infrared band canbe smaller than 40 nm, and the optical lens assembly of the projectionapparatus can be applied to an infrared band. The projection apparatuscan include a diffraction element, a focus tunable component or areflective element (like prism or mirror), wherein it is favorable forprojecting the light onto the projection surface evenly by thearrangement of the diffraction element, it is favorable for perfectingthe light converging ability by the arrangement of the focus tunablecomponent, and it is favorable for increasing the flexibility of spaceconfiguration by the arrangement of the reflective element.

The electronic device can include a receiving apparatus, which caninclude the optical lens assembly and an image sensor, wherein the imagesensor is disposed on the inside conjugation surface of the optical lensassembly. Preferably, the optical lens assembly of the receivingapparatus can be applied to an infrared band, wherein the image sensorcan be utilized for detecting the light within the infrared band. Thereceiving apparatus can further include other element with filterfunction, such as a protecting plate (like glass, metal or plasticmaterial), a filter, etc., or the optical lens assembly can include anelement with filter function, such as a filter, a lens element withfilter function, etc.

The electronic device can include an image capturing apparatus, whichcan include the optical lens assembly and an image sensor, wherein theimage sensor is disposed on the inside conjugation surface of theoptical lens assembly. Preferably, the optical lens assembly of theimage capturing apparatus can be applied to an infrared band, whereinthe image sensor can be utilized for detecting the light within theinfrared band. The image capturing apparatus can further include otherelement with filter function, such as a protecting plate (like glass,metal or plastic material), a filter, etc., or the optical lens assemblycan include an element with filter function, such as a filter, a lenselement with filter function, etc.

The electronic device can include sensing module, which can include theaforementioned projection apparatus or the aforementioned receivingapparatus, or can include both of the aforementioned projectionapparatus and the aforementioned receiving apparatus. The optical lensassembly of the projection apparatus can project the light of the lightsource onto the outside conjugation surface. The optical lens assemblyof the receiving apparatus can be utilized for receiving the informationon the outside conjugation surface of the optical lens assembly of theprojection apparatus, and then imaging on the image sensor thereof.

When the measurement is made in accordance with the reference wavelengthas the d-line, at least six lens elements of the lens elements of theoptical lens assembly of the projection apparatus and the lens elementsof the optical lens assembly of the receiving apparatus can have Abbenumbers smaller than 38. Therefore, it is favorable for enhancing thesensing precision and module compactness, especially applying to theinfrared band, which can provide better effect. Preferably, at leastseven lens elements of the lens elements can have Abbe numbers smallerthan 38. More preferably, at least eight lens elements of the lenselements can have Abbe numbers smaller than 38.

In the optical lens assembly of each of the projection apparatus and thereceiving apparatus, when an axial distance between an outside surfaceof one of the lens elements closest to the outside and an inside surfaceof one of the lens elements closest to the inside is TD, the followingcondition is satisfied: 1 mm<TD<5 mm. Therefore, it is favorable forobtaining the compactness of the sensing module so as to apply toportable devices.

A total number of the lens elements in the optical lens assembly of theprojection apparatus can be four, so that it is favorable for balancingthe projection quality and compactness. A total number of the lenselements in the optical lens assembly of the receiving apparatus can befour, so that it is favorable for balancing the imaging quality andcompactness.

At least six of the lens elements of the optical lens assembly of theprojection apparatus and the lens elements of the optical lens assemblyof the receiving apparatus can be made of plastic materials. Therefore,finishing and manufacturing difficulty can be decreased.

In each of the aforementioned optical lens assemblies, at least one ofthe outside surface and the inside surface of one of the lens elementsclosest to an inside of each optical lens assembly can include at leastone critical point. Therefore, it is favorable for correcting off-axisaberrations and reducing the size thereof.

The aforementioned light source can be composed by a laser array, whichcan be formed into a structured light through the optical lens assemblyof the projection lens system, and projected on a sensed object. Theoptical lens assembly of the receiving apparatus can receive thereflective light from the sensed object, imaging on the image sensor,and the received information can be calculated by the processor so as toobtain the relative distance of each portion of the sensed object,further obtain the 3D-shaped variation on the surface of the sensedobject. The structured light can utilize the structure, such as dot,spot or stripe, etc., but is not limited thereto. The three-dimensionalsensing method can utilize time-of-flight (TOF), structured light orlight coding, etc., but is not limited thereto.

Furthermore, the aforementioned projection apparatus can include a highdirectivity (low divergence) and a high intensity light source, whereinthe light source can be a laser, SLED, Micro-LED, RCLED, a verticalcavity surface emitting laser (VCSEL), etc., and the light source can bea single light source or multiple light sources disposed on the insideconjugation surface of the optical lens assembly, so as to provide highprojection quality. When the light source of the projection apparatusaccording to the present disclosure is a vertical cavity surfaceemitting laser and disposed on the inside conjugation surface of theoptical lens assembly, it is favorable for providing a high directivity,a low divergence and a high intensity light source by proper lightarrangement, so as to increase the illuminance of the outsideconjugation surface of the optical lens assembly.

According to the electronic device of the present disclosure, theoutside refers to outside of mechanism, the inside refers to inside ofmechanism.

Taking the image capturing apparatus as an example, the inside directionrefers to an image-side direction, the inside surface refers to animage-side surface, the outside direction refers to an object-sidedirection, the outside surface refers to an object-side surface. Takingthe projection apparatus as an example, the inside direction is a lightsource direction, that is, a reduction side, the inside surface is alight incident surface, the outside direction is a projection direction,that is, a magnification side, the outside surface is a light exitingsurface. The inside conjugation surface is located on the focus surfaceinside of the mechanism, that is, the image surface of the imagecapturing apparatus, and the conjugation surface of the reduction sideof the projection apparatus. IH represents the maximum radius of theoptical effective region of the inside conjugation surface in theoptical lens assembly, that is, the maximum image height of the imagecapturing apparatus, and the maximum radius of the light source of theprojection apparatus.

According to the present disclosure, the electronic device can furtherinclude but not limited to a control unit, a display, a storage unit, arandom access memory unit (RAM) or a combination thereof.

In the electronic device of the present disclosure, the optical lensassembly can be applied to the visible light band, or the infrared band.Preferably, the optical lens assembly can be applied to both of thevisible light band and the infrared band.

According to the optical lens assembly of the present disclosure, thelens elements thereof can be made of glass or plastic materials. Whenthe lens elements are made of glass materials, the distribution of therefractive power of the optical lens assembly may be more flexible todesign. When the lens elements are made of plastic materials,manufacturing costs can be effectively reduced. Furthermore, surfaces ofeach lens element can be arranged to be aspheric, since the asphericsurface of the lens element is easy to form a shape other than aspherical surface so as to have more controllable variables foreliminating aberrations thereof, and to further decrease the requiredamount of lens elements in the optical lens assembly. Therefore, thetotal track length of the optical lens assembly can also be reduced.

According to the optical lens assembly of the present disclosure, when alens surface is aspheric, which refers that the lens surface has anaspheric shape throughout its optically effective area, or a portion(s)thereof.

According to the optical lens assembly of the present disclosure, eachof an outside surface and an inside surface has a paraxial region and anoff-axis region. The paraxial region refers to the region of the surfacewhere light rays travel close to an optical axis, and the off-axisregion refers to the region of the surface away from the paraxialregion. Particularly unless otherwise stated, when the lens element hasa convex surface, it indicates that the surface can be convex in theparaxial region thereof; when the lens element has a concave surface, itindicates that the surface can be concave in the paraxial regionthereof. According to the optical lens assembly of the presentdisclosure, the refractive power or the focal length of a lens elementbeing positive or negative may refer to the refractive power or thefocal length in a paraxial region of the lens element.

According to the optical lens assembly of the present disclosure, theoptical lens assembly can include at least one stop, such as an aperturestop, a glare stop or a field stop. Said glare stop or said field stopis for eliminating the stray light and thereby improving the imageresolution thereof.

According to the optical lens assembly of the present disclosure, theinside conjugation surface of the optical lens assembly, based on thecorresponding image sensor or light source, can be flat or curved. Inparticular, the inside conjugation surface can be a concave curvedsurface facing towards the outside. According to the optical lensassembly of the present disclosure, at least one correcting element(such as a field flattener) can be selectively disposed between the lenselement closest to the inside of the optical lens assembly and theinside conjugation surface so as to correct the image (such as the fieldcurvature). Properties of the correcting element, such as curvature,thickness, refractive index, position, surface shape (convex/concave,spherical/aspheric/diffractive/Fresnel etc.) can be adjusted accordingto the requirements of the apparatus. In general, the correcting elementis preferably a thin plano-concave element having a concave surfacetoward the outside and is disposed close to the inside conjugationsurface.

According to the optical lens assembly of the present disclosure, anaperture stop can be configured as a front stop or a middle stop. Afront stop disposed between an outside conjugation surface and the firstlens element can provide a longer distance between an exit pupil of theoptical lens assembly and the inside conjugation surface, and therebyobtains a telecentric effect and improves the image-sensing efficiencyof the image sensor, such as CCD or CMOS, or improves the projectiveefficiency. A middle stop disposed between the first lens element andthe inside conjugation surface is favorable for enlarging the field ofview of the optical lens assembly and thereby provides a wider field ofview for the same.

According to the optical lens assembly of the present disclosure, acritical point is a non-axial point of the lens surface where itstangent is perpendicular to the optical axis.

Each of the aforementioned features of the optical lens assembly can beutilized in various combinations for achieving the correspondingeffects.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an electronic device according to the 1stembodiment of the present disclosure. FIG. 2 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 1st embodiment. In FIG. 1, the electronic deviceincludes an optical lens assembly (its reference numeral is omitted),wherein the optical lens assembly includes, in order from an outside toan inside, an aperture stop 100, a first lens element 110, a second lenselement 120, a third lens element 130, a fourth lens element 140, afilter 150 and an inside conjugation surface 160. The optical lensassembly includes four lens elements (110, 120, 130 and 140) withoutadditional one or more lens elements inserted between the first lenselement 110 and the fourth lens element 140.

The first lens element 110 with positive refractive power has an outsidesurface 111 being convex in a paraxial region thereof and an insidesurface 112 being concave in a paraxial region thereof. The first lenselement 110 is made of a plastic material, and has the outside surface111 and the inside surface 112 being both aspheric.

The second lens element 120 with negative refractive power has anoutside surface 121 being concave in a paraxial region thereof and aninside surface 122 being convex in a paraxial region thereof. The secondlens element 120 is made of a plastic material, and has the outsidesurface 121 and the inside surface 122 being both aspheric.

The third lens element 130 with positive refractive power has an outsidesurface 131 being concave in a paraxial region thereof and an insidesurface 132 being convex in a paraxial region thereof. The third lenselement 130 is made of a plastic material, and has the outside surface131 and the inside surface 132 being both aspheric.

The fourth lens element 140 with negative refractive power has anoutside surface 141 being convex in a paraxial region thereof and aninside surface 142 being concave in a paraxial region thereof. Thefourth lens element 140 is made of a plastic material, and has theoutside surface 141 and the inside surface 142 being both aspheric.Furthermore, each of the outside surface 141 and the inside surface 142of the fourth lens element 140 includes at least one critical pointCP41, CP42 (shown in FIG. 25) in an off-axis region thereof.

The filter 150 is made of a glass material and located between thefourth lens element 140 and the inside conjugation surface 160, and willnot affect the focal length of the optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:X(Y)=(Y ² /R)/(1+sqrt(1−(1+k)×(Y/R)²))+Σ_(l)(Ai)×(Y ^(i))

where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from the optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient.

In the optical lens assembly according to the 1st embodiment, when afocal length of the optical lens assembly is f, an f-number of theoptical lens assembly is Fno, and half of a maximum field of view of theoptical lens assembly is HFOV, these parameters have the followingvalues: f=2.40 mm; Fno=1.48; and HFOV=43.2 degrees.

In the optical lens assembly according to the 1st embodiment, when ameasurement is made in accordance with a reference wavelength as ad-line (587.6 nm), a refractive index of the first lens element 110 isNd1, the following condition is satisfied: Nd1=1.614.

In the optical lens assembly according to the 1st embodiment, when themeasurement is made in accordance with the reference wavelength as thed-line, an Abbe number of the first lens element 110 is Vd1, an Abbenumber of the second lens element 120 is Vd2, an Abbe number of thethird lens element 130 is Vd3, an Abbe number of the fourth lens element140 is Vd4, and a sum of the Abbe numbers of the first lens element 110,the second lens element 120, the third lens element 130 and the fourthlens element 140 is ΣVd (that is, ΣVd=Vd1+Vd2+Vd3+Vd4), the followingconditions are satisfied: Vd1=26.0; Vd1/Vd2=1.27; Vd1/Vd3=1.27;Vd1/Vd4=1.27; Vd2=20.4; Vd3=20.4; Vd4=20.4; and ΣVd=87.2.

In the optical lens assembly according to the 1st embodiment, when acentral thickness of the first lens element 110 is CT1, and an axialdistance between the first lens element 110 and the second lens element120 is T12, the following condition is satisfied: CT1/T12=1.15.

In the optical lens assembly according to the 1st embodiment, when acentral thickness of the second lens element 120 is CT2, and a centralthickness of the fourth lens element 140 is CT4, the following conditionis satisfied: CT2/CT4=0.72.

In the optical lens assembly according to the 1st embodiment, when anaxial distance between an outside surface of one of the lens elementsclosest to the outside (that is, the outside surface 111 of the firstlens element 110 in the 1st embodiment) and an inside surface of one ofthe lens elements closest to the inside (that is, the inside surface 142of the fourth lens element 140 in the 1st embodiment) is TD, thefollowing condition is satisfied: TD=2.26 mm.

In the optical lens assembly according to the 1st embodiment, when anaxial distance between the outside surface 111 of the first lens element110 and the inside conjugation surface 160 of the optical lens assemblyis TL, and a maximum radius of an optical effective region of the insideconjugation surface 160 of the optical lens assembly is IH, thefollowing condition is satisfied: TL/IH=1.48.

In the optical lens assembly according to the 1st embodiment, when acurvature radius of the outside surface 111 of the first lens element110 is R1, a curvature radius of the inside surface 112 of the firstlens element 110 is R2, and a curvature radius of the outside surface141 of the fourth lens element 140 is R7, the following conditions aresatisfied: R1/R2=0.42; and R2/R7=2.24.

In the optical lens assembly according to the 1st embodiment, when thecurvature radius of the inside surface 112 of the first lens element 110is R2, and when the measurement is made in accordance with the referencewavelength as the d-line, a focal length of the optical lens assembly isfd, the following condition is satisfied: R2/fd=1.32.

In the optical lens assembly according to the 1st embodiment, when acurvature radius of the inside surface 142 of the fourth lens element140 is R8, and when the measurement is made in accordance with thereference wavelength as the d-line, the focal length of the optical lensassembly is fd, the following condition is satisfied: R8/fd=0.41.

In the optical lens assembly according to the 1st embodiment, when themeasurement is made in accordance with the reference wavelength as thed-line, the focal length of the optical lens assembly is fd, a focallength of the third lens element 130 is fd3, a focal length of thefourth lens element 140 is fd4, and a maximum of two values of |fd/fd3|and |fd/fd4| is max(|fd/fd3|, |fd/fd4|), the following conditions aresatisfied: fd/fd3=0.70; |fd/fd3|+|fd/fd4|=0.98; and max(|fd/fd3|,|fd/fd4|)=0.70.

In the optical lens assembly according to the 1st embodiment, when themeasurement is made in accordance with the reference wavelength as thed-line, a focal length of the first lens element 110 is fd1, a focallength of the second lens element 120 is fd2, the focal length of thethird lens element 130 is fd3, and the focal length of the fourth lenselement 140 is fd4, the following condition is satisfied:(|1/fd1|+|1/fd2|)/(|1/fd3|+|1/fd4|)=0.75.

In the optical lens assembly according to the 1st embodiment, when anaxial distance between the aperture stop 100 and the inside conjugationsurface 160 of the optical lens assembly is SL, and an axial distancebetween the outside surface 111 of the first lens element 110 and theinside conjugation surface 160 of the optical lens assembly is TL, thefollowing condition is satisfied: SL/TL=0.92.

The detailed optical data of the 1st embodiment are shown in Tables 1Aand 1B, and the aspheric surface data are shown in Table 2 below.

TABLE 1A 1st Embodiment f = 2.40 mm, Fno = 1.48, HFOV = 43.2 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 600.000 conjugation surface  1 Ape. Stop Plano −0.281 2 Lens 1 1.274 ASP 0.453 Plastic 1.594 26.0 3.37  3 3.048 ASP 0.394  4Lens 2 −16.319 ASP 0.328 Plastic 1.634 20.4 −88.86  5 −23.157 ASP 0.238 6 Lens 3 −1.035 ASP 0.370 Plastic 1.634 20.4 3.47  7 −0.801 ASP 0.022 8 Lens 4 1.362 ASP 0.453 Plastic 1.634 20.4 −8.24  9 0.941 ASP 0.500 10Filter Plano 0.145 Glass 1.508 64.2 — 11 Plano 0.492 12 Inside Plano —conjugation surface Reference wavelength is 940.0 nm Effective radius ofSurface 5 is 0.850 mm

TABLE 1B 1st Embodiment fd = 2.30 mm Surface # Index Focal Length 0Outside conjugation surface 1 Ape. Stop 2 Lens 1 1.614 3.25 3 4 Lens 21.660 −85.36 5 6 Lens 3 1.660 3.30 7 8 Lens 4 1.660 −8.06 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 k = −1.3621E+00 9.8527E+00 −6.2427E+01  1.0348E+01 A4 =  5.2900E−02 −5.1945E−02−3.6923E−01 −3.4642E−01 A6 =  1.9592E−01 −1.8590E−01  7.1742E−01 1.1290E+00 A8 = −7.9040E−02  7.7172E−01 −7.1766E+00 −6.3080E+00 A10 =−1.4209E+00 −3.5484E+00  3.1299E+01  1.8207E+01 A12 =  3.3859E+00 6.3995E+00 −8.0080E+01 −2.8507E+01 A14 = −2.4674E+00 −6.2229E+00 1.0372E+02  2.1970E+01 A16 =  2.3645E+00 −5.0614E+01 −5.7753E+00Surface # 6 7 8 9 k = 1.8953E−01 −7.3447E+00 −6.8788E−01 −4.8628E+00 A4= 2.3972E−01 −1.4078E+00 −5.5202E−01 −2.6074E−01 A6 = 6.0228E−01 5.0381E+00  5.5329E−01  2.6091E−01 A8 = −7.3869E+00  −1.4183E+01−4.2818E−01 −1.9719E−01 A10 = 2.7483E+01  2.5531E+01  2.1197E−01 9.3754E−02 A12 = −4.4540E+01  −2.5622E+01 −6.1912E−02 −2.7309E−02 A14 =3.3950E+01  1.3254E+01  9.7621E−03  4.4423E−03 A16 = −9.7250E+00 −2.7856E+00 −6.4485E−04 −3.0510E−04

In Table 1A, the detailed optical data of the 1st embodiment in FIG. 1are stated, and in Table 1B, the refractive indices and the focallengths of the 1st embodiment in FIG. 1 when the measurement is made inaccordance with the reference wavelength as the d-line are stated,wherein the curvature radii, the thicknesses and the focal lengths areshown in millimeters (mm). Surface numbers 0-12 represent the surfacessequentially arranged from the outside to the inside along the opticalaxis. In Table 2, k represents the conic coefficient of the equation ofthe aspheric surface profiles. A4-A16 represent the asphericcoefficients ranging from the 4th order to the 16th order. The tablespresented below for each embodiment correspond to schematic parameterand aberration curves of each embodiment, and term definitions of thetables are the same as those in Table 1A, Table 1B and Table 2 of the1st embodiment. Therefore, an explanation in this regard will not beprovided again.

2nd Embodiment

FIG. 3 is a schematic view of an electronic device according to the 2ndembodiment of the present disclosure. FIG. 4 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 2nd embodiment. In FIG. 3, the electronic deviceincludes an optical lens assembly (its reference numeral is omitted),wherein the optical lens assembly includes, in order from an outside toan inside, a first lens element 210, an aperture stop 200, a second lenselement 220, a third lens element 230, a fourth lens element 240 and aninside conjugation surface 260. The optical lens assembly includes fourlens elements (210, 220, 230 and 240) without additional one or morelens elements inserted between the first lens element 210 and the fourthlens element 240.

The first lens element 210 with positive refractive power has an outsidesurface 211 being convex in a paraxial region thereof and an insidesurface 212 being concave in a paraxial region thereof. The first lenselement 210 is made of a plastic material, and has the outside surface211 and the inside surface 212 being both aspheric.

The second lens element 220 with positive refractive power has anoutside surface 221 being concave in a paraxial region thereof and aninside surface 222 being convex in a paraxial region thereof. The secondlens element 220 is made of a plastic material, and has the outsidesurface 221 and the inside surface 222 being both aspheric.

The third lens element 230 with positive refractive power has an outsidesurface 231 being concave in a paraxial region thereof and an insidesurface 232 being convex in a paraxial region thereof. The third lenselement 230 is made of a plastic material, and has the outside surface231 and the inside surface 232 being both aspheric.

The fourth lens element 240 with negative refractive power has anoutside surface 241 being convex in a paraxial region thereof and aninside surface 242 being concave in a paraxial region thereof. Thefourth lens element 240 is made of a plastic material, and has theoutside surface 241 and the inside surface 242 being both aspheric.Furthermore, each of the outside surface 241 and the inside surface 242of the fourth lens element 240 includes at least one critical point inan off-axis region thereof.

The detailed optical data of the 2nd embodiment are shown in Tables 3Aand 3B, and the aspheric surface data are shown in Table 4 below.

TABLE 3A 2nd Embodiment f = 1.63 mm, Fno = 1.65, HFOV = 45.0 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 400.000 conjugation surface  1 Lens 1 1.237 ASP 0.336Plastic 1.634 20.4 22.17  2 1.213 ASP 0.187  3 Ape. Stop Plano 0.047  4Lens 2 −3.277 ASP 0.423 Plastic 1.634 20.4 2.24  5 −1.041 ASP 0.642  6Lens 3 −0.760 ASP 0.637 Plastic 1.634 20.4 1.67  7 −0.586 ASP 0.030  8Lens 4 1.806 ASP 0.629 Plastic 1.634 20.4 −3.21  9 0.828 ASP 0.558 10Inside Plano — conjugation surface Reference wavelength is 940.0 nm.

TABLE 3B 2nd Embodiment fd = 1.56 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.660 20.66 2 3 Ape. Stop 4 Lens 21.660 2.15 5 6 Lens 3 1.660 1.58 7 8 Lens 4 1.660 −3.11 9 10 Insideconjugation surface Reference wavelength is 587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 1 2 4 5 k = 4.6933E−01−1.6476E+01   3.2263E+00 −3.7036E+01 A4 = 1.4648E−01 1.4757E+00−1.0680E−01 −3.1352E+00 A6 = 6.8742E−01 8.1862E−01 −3.3913E+00 1.9765E+01 A8 = −1.6208E+00  −1.3581E+01   3.1887E+01 −9.7012E+01 A10 =3.2284E+00 6.8848E+01 −1.6057E+02  2.6450E+02 A12 =  2.6228E+02−3.6576E+02 A14 =  1.5985E+02 Surface # 6 7 8 9 k = −7.4296E−01−1.1011E+00 −1.6752E+00 −8.4235E+00 A4 = −2.7963E−02  2.8536E−01 1.4233E−02 −2.8891E−02 A6 = −9.8170E−01 −1.0091E+00 −1.1356E−01−6.2469E−02 A8 =  4.3964E+00  1.3120E+00  1.1321E−01  6.7605E−02 A10 =−1.3214E+01 −8.3178E−01 −6.1698E−02 −4.5801E−02 A12 =  1.8931E+01−3.4680E−01  1.5626E−02  1.9327E−02 A14 = −8.6942E+00  5.7728E−01−1.4251E−03 −4.5935E−03 A16 =  4.5328E−04

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3A, Table 3B andTable 4 as the following values and satisfy the following conditions:

2nd Embodiment f [mm] 1.63 CT2/CT4 0.67 Fno 1.65 TD [mm] 2.93 HFOV[deg.] 45.0 TL/IH 1.97 Nd1 1.660 R1/R2 1.02 Vd1 20.4 R2/R7 0.67 Vd1/Vd21.00 R2/fd 0.78 Vd1/Vd3 1.00 R8/fd 0.53 Vd1/Vd4 1.00 fd/fd3 0.99 Vd220.4 |fd/fd3| + |fd/fd4| 1.49 Vd3 20.4 max(|fd/fd3|, |fd/fd4|) 0.99 Vd420.4 (|1/fd1| + |1/fd2|)/ 0.54 ΣVd 81.6 (|1/fd3| + |1/fd4|) CT1/T12 1.44SL/TL 0.85

3rd Embodiment

FIG. 5 is a schematic view of an electronic device according to the 3rdembodiment of the present disclosure. FIG. 6 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 3rd embodiment. In FIG. 5, the electronic deviceincludes an optical lens assembly (its reference numeral is omitted),wherein the optical lens assembly includes, in order from an outside toan inside, a first lens element 310, an aperture stop 300, a second lenselement 320, a third lens element 330, a fourth lens element 340 and aninside conjugation surface 360. The optical lens assembly includes fourlens elements (310, 320, 330 and 340) without additional one or morelens elements inserted between the first lens element 310 and the fourthlens element 340.

The first lens element 310 with positive refractive power has an outsidesurface 311 being convex in a paraxial region thereof and an insidesurface 312 being concave in a paraxial region thereof. The first lenselement 310 is made of a plastic material, and has the outside surface311 and the inside surface 312 being both aspheric.

The second lens element 320 with positive refractive power has anoutside surface 321 being concave in a paraxial region thereof and aninside surface 322 being convex in a paraxial region thereof. The secondlens element 320 is made of a plastic material, and has the outsidesurface 321 and the inside surface 322 being both aspheric.

The third lens element 330 with positive refractive power has an outsidesurface 331 being concave in a paraxial region thereof and an insidesurface 332 being convex in a paraxial region thereof. The third lenselement 330 is made of a plastic material, and has the outside surface331 and the inside surface 332 being both aspheric.

The fourth lens element 340 with negative refractive power has anoutside surface 341 being convex in a paraxial region thereof and aninside surface 342 being concave in a paraxial region thereof. Thefourth lens element 340 is made of a plastic material, and has theoutside surface 341 and the inside surface 342 being both aspheric.Furthermore, each of the outside surface 341 and the inside surface 342of the fourth lens element 340 includes at least one critical point inan off-axis region thereof.

The detailed optical data of the 3rd embodiment are shown in Tables 5Aand 5B, and the aspheric surface data are shown in Table 6 below.

TABLE 5A 3rd Embodiment f = 1.62 mm, Fno = 1.65, HFOV = 45.0 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 400.000 conjugation surface  1 Lens 1 1.093 ASP 0.341Plastic 1.634 20.4 14.75  2 1.087 ASP 0.177  3 Ape. Stop Plano 0.050  4Lens 2 −2.588 ASP 0.401 Plastic 1.634 20.4 2.63  5 −1.074 ASP 0.711  6Lens 3 −0.806 ASP 0.581 Plastic 1.634 20.4 2.05  7 −0.637 ASP 0.030  8Lens 4 1.619 ASP 0.649 Plastic 1.634 20.4 −10.20  9 1.093 ASP 0.549 10Inside Plano — conjugation surface Reference wavelength is 940.0 nm.

TABLE 5B 3rd Embodiment fd = 1.56 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.660 13.80 2 3 Ape. Stop 4 Lens 21.660 2.52 5 6 Lens 3 1.660 1.94 7 8 Lens 4 1.660 −10.03 9 10 Insideconjugation surface Reference wavelength is 587.6 nm (d-line).

TABLE 6 Aspheric Coefficients Surface # 1 2 4 5 k = −1.0215E−01 −1.6051E+01  6.9732E+00 −3.4932E+01 A4 = 1.9975E−01  2.0097E+00−3.8666E−02 −2.9353E+00 A6 = 4.0285E−01 −5.0791E+00 −4.3589E+00 2.0386E+01 A8 = −5.3972E−01   1.9253E+01  4.8798E+01 −1.1270E+02 A10 =2.0449E+00 −9.2315E+00 −2.6927E+02  3.7089E+02 A12 =  5.2560E+02−6.6034E+02 A14 =  4.6252E+02 Surface # 6 7 8 9 k = −5.1586E−01−1.0198E+00 −1.2692E+00 −6.9369E+00 A4 = −7.8159E−02  8.9721E−02 1.1532E−02 −1.7541E−03 A6 =  9.6612E−01 −4.3741E−01 −1.5648E−01−5.9643E−02 A8 = −3.9972E+00  7.0880E−01  1.4892E−01 −1.4983E−02 A10 = 8.4049E+00 −1.0647E+00 −7.0741E−02  4.8039E−02 A12 = −7.9789E+00 7.9482E−01  1.6068E−02 −2.5006E−02 A14 =  2.9939E+00 −1.5188E−01−1.3678E−03  5.2310E−03 A16 = −3.8834E−04

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 5A, Table 5B andTable 6 as the following values and satisfy the following conditions:

3rd Embodiment f [mm] 1.62 CT2/CT4 0.62 Fno 1.65 TD [mm] 2.94 HFOV[deg.] 45.0 TL/IH 1.97 Nd1 1.660 R1/R2 1.00 Vd1 20.4 R2/R7 0.67 Vd1/Vd21.00 R2/fd 0.70 Vd1/Vd3 1.00 R8/fd 0.70 Vd1/Vd4 1.00 fd/fd3 0.80 Vd220.4 |fd/fd3| + |fd/fd4| 0.96 Vd3 20.4 max(|fd/fd3|, |fd/fd4|) 0.80 Vd420.4 (|1/fd1| + |1/fd2|)/ 0.76 ΣVd 81.6 (|1/fd3| + |1/fd4|) CT1/T12 1.50SL/TL 0.85

4th Embodiment

FIG. 7 is a schematic view of an electronic device according to the 4thembodiment of the present disclosure. FIG. 8 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 4th embodiment. In FIG. 7, the electronic deviceincludes an optical lens assembly (its reference numeral is omitted),wherein the optical lens assembly includes, in order from an outside toan inside, a first lens element 410, an aperture stop 400, a second lenselement 420, a third lens element 430, a fourth lens element 440 and aninside conjugation surface 460. The optical lens assembly includes fourlens elements (410, 420, 430 and 440) without additional one or morelens elements inserted between the first lens element 410 and the fourthlens element 440.

The first lens element 410 with negative refractive power has an outsidesurface 411 being convex in a paraxial region thereof and an insidesurface 412 being concave in a paraxial region thereof. The first lenselement 410 is made of a plastic material, and has the outside surface411 and the inside surface 412 being both aspheric.

The second lens element 420 with positive refractive power has anoutside surface 421 being concave in a paraxial region thereof and aninside surface 422 being convex in a paraxial region thereof. The secondlens element 420 is made of a plastic material, and has the outsidesurface 421 and the inside surface 422 being both aspheric.

The third lens element 430 with positive refractive power has an outsidesurface 431 being concave in a paraxial region thereof and an insidesurface 432 being convex in a paraxial region thereof. The third lenselement 430 is made of a plastic material, and has the outside surface431 and the inside surface 432 being both aspheric.

The fourth lens element 440 with negative refractive power has anoutside surface 441 being convex in a paraxial region thereof and aninside surface 442 being concave in a paraxial region thereof. Thefourth lens element 440 is made of a plastic material, and has theoutside surface 441 and the inside surface 442 being both aspheric.Furthermore, each of the outside surface 441 and the inside surface 442of the fourth lens element 440 includes at least one critical point inan off-axis region thereof.

The detailed optical data of the 4th embodiment are shown in Tables 7Aand 7B, and the aspheric surface data are shown in Table 8 below.

TABLE 7A 4th Embodiment f = 1.59 mm, Fno = 1.61, HFOV = 45.0 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 400.000 conjugation surface  1 Lens 1 1.242 ASP 0.365Plastic 1.641 19.5 −79.04  2 1.073 ASP 0.207  3 Ape. Stop Plano 0.053  4Lens 2 −2.958 ASP 0.397 Plastic 1.641 19.5 2.31  5 −1.040 ASP 0.772  6Lens 3 −0.813 ASP 0.531 Plastic 1.641 19.5 1.84  7 −0.604 ASP 0.010  8Lens 4 1.278 ASP 0.555 Plastic 1.641 19.5 −4.86  9 0.753 ASP 0.600 10Inside Plano — conjugation surface Reference wavelength is 940.0 nm.Effective radius of Surface 5 is 0.585 mm.

TABLE 7B 4th Embodiment fd = 1.52 mm Surface # index Focal Length 0Outside conjugation surface 1 Lens 1 1.669 −88.21 2 3 Ape. Stop 4 Lens 21.669 2.21 5 6 Lens 3 1.669 1.74 7 8 Lens 4 1.669 −4.75 9 10 Insideconjugation surface Reference wavelength is 587.6 nm (d-line).

TABLE 8 Aspheric Coefficients Surface # 1 2 4 5 k = −6.0399E−01 −5.0265E+00   1.2585E+01 −1.2856E+01 A4 = 2.4218E−01 1.0636E+00−1.5753E−01 −1.4941E+00 A6 = 3.6557E−01 2.2335E+00 −1.9142E+00 2.9042E+00 A8 = −4.3131E−01  −1.1485E+01   1.6396E+01  2.7618E+00 A10 =1.2690E+00 5.6090E+01 −9.1465E+01 −8.8844E+01 A12 =  1.3354E+02 3.2034E+02 A14 = −4.1379E+02 Surface # 6 7 8 9 k = −5.4814E−01−1.1315E+00 −1.8645E+00 −6.8699E+00 A4 =  2.2866E−01  3.0196E−01−4.8631E−02  4.3969E−02 A6 = −3.2073E−01 −1.2726E+00 −7.5137E−02−2.0916E−01 A8 = −8.2726E−01  2.6891E+00  9.5695E−02  2.0274E−01 A10 = 2.5898E+00 −4.1102E+00 −5.1304E−02 −1.1586E−01 A12 = −2.0211E+00 3.3323E+00  1.2120E−02  4.1039E−02 A14 =  6.6296E−01 −9.5129E−01−1.0040E−03 −8.4306E−03 A16 =  7.5589E−04

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 7A, Table 7B andTable 8 as the following values and satisfy the following conditions:

4th Embodiment f [mm] 1.59 CT2/CT4 0.72 Fno 1.61 TD [mm] 2.89 HFOV[deg.] 45.0 TL/IH 1.99 Nd1 1.669 R1/R2 1.16 Vd1 19.5 R2/R7 0.84 Vd1/Vd21.00 R2/fd 0.71 Vd1/Vd3 1.00 R8/fd 0.50 Vd1/Vd4 1.00 fd/fd3 0.87 Vd219.5 |fd/fd3| + |fd/fd4| 1.19 Vd3 19.5 max(|fd/fd3|, |fd/fd4|) 0.87 Vd419.5 (|1/fd1| + |1/fd2|)/ 0.59 ΣVd 77.8 (|1/fd3| + |1/fd4|) CT1/T12 1.40SL/TL 0.84

5th Embodiment

FIG. 9 is a schematic view of an electronic device according to the 5thembodiment of the present disclosure. FIG. 10 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 5th embodiment. In FIG. 9, the electronic deviceincludes an optical lens assembly (its reference numeral is omitted),wherein the optical lens assembly includes, in order from an outside toan inside, a first lens element 510, an aperture stop 500, a second lenselement 520, a third lens element 530, a fourth lens element 540, afilter 550 and an inside conjugation surface 560. The optical lensassembly includes four lens elements (510, 520, 530 and 540) withoutadditional one or more lens elements inserted between the first lenselement 510 and the fourth lens element 540.

The first lens element 510 with positive refractive power has an outsidesurface 511 being convex in a paraxial region thereof and an insidesurface 512 being concave in a paraxial region thereof. The first lenselement 510 is made of a plastic material, and has the outside surface511 and the inside surface 512 being both aspheric.

The second lens element 520 with positive refractive power has anoutside surface 521 being concave in a paraxial region thereof and aninside surface 522 being convex in a paraxial region thereof. The secondlens element 520 is made of a plastic material, and has the outsidesurface 521 and the inside surface 522 being both aspheric.

The third lens element 530 with positive refractive power has an outsidesurface 531 being concave in a paraxial region thereof and an insidesurface 532 being convex in a paraxial region thereof. The third lenselement 530 is made of a plastic material, and has the outside surface531 and the inside surface 532 being both aspheric.

The fourth lens element 540 with positive refractive power has anoutside surface 541 being convex in a paraxial region thereof and aninside surface 542 being concave in a paraxial region thereof. Thefourth lens element 540 is made of a plastic material, and has theoutside surface 541 and the inside surface 542 being both aspheric.Furthermore, each of the outside surface 541 and the inside surface 542of the fourth lens element 540 includes at least one critical point inan off-axis region thereof.

The filter 550 is made of a glass material and located between thefourth lens element 540 and the inside conjugation surface 560, and willnot affect the focal length of the optical lens assembly.

The detailed optical data of the 5th embodiment are shown in Tables 9Aand 9B, and the aspheric surface data are shown in Table 10 below.

TABLE 9A 5th Embodiment f = 1.67 mm, Fno = 1.58, HFOV = 45.2 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 400.000 conjugation surface  1 Lens 1 0.972 ASP 0.271Plastic 1.641 19.5 9.29  2 1.035 ASP 0.189  3 Ape. Stop Plano 0.074  4Lens 2 −2.109 ASP 0.377 Plastic 1.641 19.5 2.71  5 −1.020 ASP 0.821  6Lens 3 −0.801 ASP 0.597 Plastic 1.641 19.5 2.63  7 −0.701 ASP 0.010  8Lens 4 1.442 ASP 0.557 Plastic 1.641 19.5 14.42  9 1.450 ASP 0.350 10Filter Plano 0.100 Glass 1.508 64.2 — 11 Plano 0.143 12 Inside Plano —conjugation surface Reference wavelength is 940.0 nm. Effective radiusof Surface 5 is 0.630 mm.

TABLE 9B 5th Embodiment fd = 1.62 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.669 8.76 2 3 Ape. Stop 4 Lens 21.669 2.59 5 6 Lens 3 1.669 2.47 7 8 Lens 4 1.669 13.48 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 10 Aspheric Coefficients Surface # 1 2 4 5 k = 5.8634E−01−4.1733E+00   7.8306E+00 −1.8060E+01 A4 = 1.2889E−01 9.3735E−01−1.7415E−01 −1.9324E+00 A6 = 1.1116E−01 1.4462E−01 −1.1159E+00 8.2476E+00 A8 = 3.2883E−2  1.0082E+00  1.0336E+01 −3.1133E+01 A10 =1.7659E+00 1.4161E+01 −5.1790E+01  6.4831E+01 A12 =  8.1969E+01−5.7203E+01 A14 = −9.9270E+00 Surface # 6 7 8 9 k = −5.1704E−01−9.5378E−01 −1.3946E+00 −3.6371E+00 A4 = −7.8171E−02 −3.8642E−03 6.7368E−02  1.7683E−01 A6 =  8.6137E−01 −1.7672E−01 −2.9215E−01−4.9344E−01 A8 = −2.9824E+00  2.0628E−01  2.6041E−01  4.4014E−01 A10 = 5.2777E+00 −2.5365E−01 −1.1197E−01 −2.1173E−01 A12 = −3.9481E+00 1.1391E−01  2.2991E−02  5.8806E−02 A14 =  1.1316E+00  3.0979E−02−1.7837E−03 −9.1865E−03 A16 =  6.4250E−04

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 9A, Table 9B andTable 10 as the following values and satisfy the following conditions:

5th Embodiment f [mm] 1.67 CT2/CT4 0.68 Fno 1.58 TD [mm] 2.90 HFOV[deg.] 45.2 TL/IH 1.92 Nd1 1.669 R1/R2 0.94 Vd1 19.5 R2/R7 0.72 Vd1/Vd21.00 R2/fd 0.64 Vd1/Vd3 1.00 R8/fd 0.90 Vd1/Vd4 1.00 fd/fd3 0.65 Vd219.5 |fd/fd3| + |fd/fd4| 0.77 Vd3 19.5 max(|fd/fd3|, |fd/fd4|) 0.65 Vd419.5 (|1/fd1| + |1/fd2|)/ 1.05 ΣVd 77.8 (|1/fd3| + |1/fd4|) CT1/T12 1.03SL/TL 0.87

6th Embodiment

FIG. 11 is a schematic view of an electronic device according to the 6thembodiment of the present disclosure. FIG. 12 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 6th embodiment. In FIG. 11, the electronicdevice includes an optical lens assembly (its reference numeral isomitted), wherein the optical lens assembly includes, in order from anoutside to an inside, a first lens element 610, an aperture stop 600, asecond lens element 620, a third lens element 630, a fourth lens element640, a filter 650 and an inside conjugation surface 660. The opticallens assembly includes four lens elements (610, 620, 630 and 640)without additional one or more lens elements inserted between the firstlens element 610 and the fourth lens element 640.

The first lens element 610 with positive refractive power has an outsidesurface 611 being convex in a paraxial region thereof and an insidesurface 612 being concave in a paraxial region thereof. The first lenselement 610 is made of a plastic material, and has the outside surface611 and the inside surface 612 being both aspheric.

The second lens element 620 with positive refractive power has anoutside surface 621 being concave in a paraxial region thereof and aninside surface 622 being convex in a paraxial region thereof. The secondlens element 620 is made of a plastic material, and has the outsidesurface 621 and the inside surface 622 being both aspheric.

The third lens element 630 with negative refractive power has an outsidesurface 631 being concave in a paraxial region thereof and an insidesurface 632 being convex in a paraxial region thereof. The third lenselement 630 is made of a plastic material, and has the outside surface631 and the inside surface 632 being both aspheric.

The fourth lens element 640 with positive refractive power has anoutside surface 641 being convex in a paraxial region thereof and aninside surface 642 being concave in a paraxial region thereof. Thefourth lens element 640 is made of a plastic material, and has theoutside surface 641 and the inside surface 642 being both aspheric.Furthermore, the inside surface 642 of the fourth lens element 640includes at least one critical point in an off-axis region thereof.

The filter 650 is made of a glass material and located between thefourth lens element 640 and the inside conjugation surface 660, and willnot affect the focal length of the optical lens assembly.

The detailed optical data of the 6th embodiment are shown in Tables 11Aand 11B, and the aspheric surface data are shown in Table 12 below.

TABLE 11A 6th Embodiment f = 1.84 mm, Fno = 2.00, HFOV = 35.0 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length0 Outside Plano 1000.000 conjugation surface  1 Lens 1 0.972 ASP 0.344Plastic 1.536 56.1 5.29  2 1.295 ASP 0.137  3 Ape. Stop Plano 0.122  4Lens 2 −4.092 ASP 0.745 Plastic 1.535 56.0 2.13  5 −0.948 ASP 0.236  6Lens 3 −0.313 ASP 0.370 Plastic 1.535 56.0 −1.62  7 −0.692 ASP 0.030  8Lens 4 0.715 ASP 0.969 Plastic 1.535 56.0 1.54  9 2.820 ASP 0.500 10Filter Plano 0.210 Glass 1.508 64.2 — 11 Plano 0.127 12 Inside Plano —conjugation surface Reference wavelength is 940.0 nm.

TABLE 11B 6th Embodiment fd = 1.80 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.545 5.19 2 3 Ape. Stop 4 Lens 21.544 2.09 5 6 Lens 3 1.544 −1.60 7 8 Lens 4 1.544 1.52 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 1 2 4 5 k = 6.1836E−01 4.0166E+00 −9.7783E+00 4.7583E−02 A4 = 1.3739E−01 −2.8248E−02−3.9856E−01 9.2090E−02 A6 = 2.0678E−02  1.0450E+00 −3.6645E+00−1.2572E+00  A8 = 9.1300E−01 −8.5701E+00  2.6609E+01 −6.4258E−01  A10 =−1.3357E+02 1.4704E+01 A12 = −2.9577E+01  A14 = 1.9416E+01 Surface # 6 78 9 k = −1.8931E+00 −1.0086E+00 −3.9034E+00 −8.4049E−01 A4 =  4.3852E−01 3.1018E−01 −1.0149E−01 −5.0401E−02 A6 = −9.1531E+00 −2.1623E+00 1.5353E−01 −1.2050E−01 A8 =  3.4314E+01  5.1394E+00 −1.3382E−01 1.9224E−01 A10 = −5.1998E+01 −4.9759E+00  6.1681E−02 −1.3516E−01 A12 = 3.7372E+01  1.8651E+00 −1.4948E−02  4.1994E−02 A14 = −1.0742E+01−5.0119E−03

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 11A, Table 11Band Table 12 as the following values and satisfy the followingconditions:

6th Embodiment f [mm] 1.84 CT2/CT4 0.77 Fno 2.00 TD [mm] 2.95 HFOV[deg.] 35.0 TL/IH 2.95 Nd1 1.545 R1/R2 0.75 Vd1 56.1 R2/R7 1.81 Vd1/Vd21.00 R2/fd 0.72 Vd1/Vd3 1.00 R8/fd 1.56 Vd1/Vd4 1.00 fd/fd3 −1.13 Vd256.0 |fd/fd3| + |fd/fd4| 2.32 Vd3 56.0 max(|fd/fd3|, |fd/fd4|) 1.19 Vd456.0 (|1/fd1| + |1/fd2|)/ 0.52 ΣVd 224.0 (|1/fd3| + |1/fd4|) CT1/T121.33 SL/TL 0.87

7th Embodiment

FIG. 13 is a schematic view of an electronic device according to the 7thembodiment of the present disclosure. FIG. 14 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 7th embodiment. In FIG. 13, the electronicdevice includes an optical lens assembly (its reference numeral isomitted), wherein the optical lens assembly includes, in order from anoutside to an inside, a first lens element 710, an aperture stop 700, asecond lens element 720, a third lens element 730, a fourth lens element740, a filter 750 and an inside conjugation surface 760. The opticallens assembly includes four lens elements (710, 720, 730 and 740)without additional one or more lens elements inserted between the firstlens element 710 and the fourth lens element 740.

The first lens element 710 with positive refractive power has an outsidesurface 711 being convex in a paraxial region thereof and an insidesurface 712 being concave in a paraxial region thereof. The first lenselement 710 is made of a plastic material, and has the outside surface711 and the inside surface 712 being both aspheric.

The second lens element 720 with positive refractive power has anoutside surface 721 being concave in a paraxial region thereof and aninside surface 722 being convex in a paraxial region thereof. The secondlens element 720 is made of a plastic material, and has the outsidesurface 721 and the inside surface 722 being both aspheric.

The third lens element 730 with negative refractive power has an outsidesurface 731 being concave in a paraxial region thereof and an insidesurface 732 being convex in a paraxial region thereof. The third lenselement 730 is made of a plastic material, and has the outside surface731 and the inside surface 732 being both aspheric.

The fourth lens element 740 with positive refractive power has anoutside surface 741 being convex in a paraxial region thereof and aninside surface 742 being concave in a paraxial region thereof. Thefourth lens element 740 is made of a plastic material, and has theoutside surface 741 and the inside surface 742 being both aspheric.Furthermore, the inside surface 742 of the fourth lens element 740includes at least one critical point in an off-axis region thereof.

The filter 750 is made of a glass material and located between thefourth lens element 740 and the inside conjugation surface 760, and willnot affect the focal length of the optical lens assembly.

The detailed optical data of the 7th embodiment are shown in Tables 13Aand 13B, and the aspheric surface data are shown in Table 14 below.

TABLE 13A 7th Embodiment f = 1.84 mm, Fno = 2.00, HFOV = 35.0 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 1000.000 conjugation surface  1 Lens 1 1.005 ASP 0.374Plastic 1.618 22.5 4.53  2 1.344 ASP 0.209  3 Ape. Stop Plano 0.163  4Lens 2 −2.924 ASP 0.689 Plastic 1.618 22.5 2.18  5 −1.005 ASP 0.229  6Lens 3 −0.340 ASP 0.347 Plastic 1.618 22.5 −1.56  7 −0.730 ASP 0.030  8Lens 4 0.778 ASP 0.893 Plastic 1.618 22.5 1.47  9 3.090 ASP 0.500 10Filter Plano 0.210 Glass 1.508 64.2 — 11 Plano 0.140 12 Inside Plano —conjugation surface Reference wavelength is 940.0 nm.

TABLE 13B 7th Embodiment fd = 1.76 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.642 4.33 2 3 Ape. Stop 4 Lens 21.642 2.09 5 6 Lens 3 1.642 −1.52 7 8 Lens 4 1.642 1.41 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 14 Aspheric Coefficients Surface # 1 2 4 5 k = −5.9630E−01  3.5943E+00 −3.3220E+00  3.6458E−02 A4 = 2.0767E−01 −3.4294E−02−5.8724E−01 −9.8875E−02 A6 = 1.8033E−01  1.6371E−01 −1.0831E+00−8.7868E−01 A8 = 3.7078E−01 −3.4760E+00  8.8810E−02 −2.4206E+00 A10 =−3.5630E+01  1.9241E+01 A12 = −3.5364E+01 A14 =  2.3156E+01 Surface # 67 8 9 k = −1.9412E+00 −9.9475E−01 −4.5839E+00  3.8486E−01 A4 = 4.7519E−01  2.8880E−01 −7.3312E−02 −4.6224E−02 A6 = −9.5533E+00−2.0738E+00  9.1987E−02 −1.4985E−01 A8 =  3.6391E+01  5.2460E+00−5.5296E−02  2.5475E−01 A10 = −5.8023E+01 −5.3727E+00  1.1194E−02−1.9055E−01 A12 =  4.4998E+01  2.0601E+00 −1.9353E−03  6.4120E−02 A14 =−1.4167E+01 −8.2200E−03

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 13A, Table 13Band Table 14 as the following values and satisfy the followingconditions:

7th Embodiment f [mm] 1.84 CT2/CT4 0.77 Fno 2.00 TD [mm] 2.93 HFOV[deg.] 35.0 TL/IH 2.94 Nd1 1.642 R1/R2 0.75 Vd1 22.5 R2/R7 1.73 Vd1/Vd21.00 R2/fd 0.76 Vd1/Vd3 1.00 R8/fd 1.75 Vd1/Vd4 1.00 fd/fd3 −1.16 Vd222.5 |fd/fd3| + |fd/fd4| 2.41 Vd3 22.5 max(|fd/fd3|, |fd/fd4|) 1.25 Vd422.5 (|1/fd1| + |1/fd2|)/ 0.52 ΣVd 89.9 (|1/fd3| + |1/fd4|) CT1/T12 1.01SL/TL 0.85

8th Embodiment

FIG. 15 is a schematic view of an electronic device according to the 8thembodiment of the present disclosure. FIG. 16 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 8th embodiment. In FIG. 15, the electronicdevice includes an optical lens assembly (its reference numeral isomitted), wherein the optical lens assembly includes, in order from anoutside to an inside, a first lens element 810, an aperture stop 800, asecond lens element 820, a third lens element 830, a fourth lens element840, a filter 850 and an inside conjugation surface 860. The opticallens assembly includes four lens elements (810, 820, 830 and 840)without additional one or more lens elements inserted between the firstlens element 810 and the fourth lens element 840.

The first lens element 810 with positive refractive power has an outsidesurface 811 being convex in a paraxial region thereof and an insidesurface 812 being concave in a paraxial region thereof. The first lenselement 810 is made of a plastic material, and has the outside surface811 and the inside surface 812 being both aspheric.

The second lens element 820 with positive refractive power has anoutside surface 821 being concave in a paraxial region thereof and aninside surface 822 being convex in a paraxial region thereof. The secondlens element 820 is made of a plastic material, and has the outsidesurface 821 and the inside surface 822 being both aspheric.

The third lens element 830 with negative refractive power has an outsidesurface 831 being concave in a paraxial region thereof and an insidesurface 832 being convex in a paraxial region thereof. The third lenselement 830 is made of a plastic material, and has the outside surface831 and the inside surface 832 being both aspheric.

The fourth lens element 840 with positive refractive power has anoutside surface 841 being convex in a paraxial region thereof and aninside surface 842 being concave in a paraxial region thereof. Thefourth lens element 840 is made of a plastic material, and has theoutside surface 841 and the inside surface 842 being both aspheric.Furthermore, the inside surface 842 of the fourth lens element 840includes at least one critical point in an off-axis region thereof.

The filter 850 is made of a glass material and located between thefourth lens element 840 and the inside conjugation surface 860, and willnot affect the focal length of the optical lens assembly.

The detailed optical data of the 8th embodiment are shown in Tables 15Aand 15B, and the aspheric surface data are shown in Table 16 below.

TABLE 15A 8th Embodiment f = 1.82 mm, Fno = 2.00, HFOV = 35.0 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 1000.000 conjugation surface  1 Lens 1 1.086 ASP 0.547Plastic 1.634 20.4 5.12  2 1.313 ASP 0.164  3 Ape. Stop Plano 0.145  4Lens 2 −2.887 ASP 0.720 Plastic 1.617 23.5 1.88  5 −0.908 ASP 0.193  6Lens 3 −0.334 ASP 0.313 Plastic 1.634 20.4 −1.60  7 −0.679 ASP 0.030  8Lens 4 0.774 ASP 0.782 Plastic 1.617 23.5 1.50  9 2.881 ASP 0.500 10Filter Plano 0.210 Glass 1.508 64.2 — 11 Plano 0.164 12 Inside Plano —conjugation surface Reference wavelength is 940.0 nm. Effective radiusof Surface 5 is 0.730 mm.

TABLE 15B 8th Embodiment fd = 1.76 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.660 4.86 2 3 Ape. Stop 4 Lens 21.639 1.82 5 6 Lens 3 1.660 −1.56 7 8 Lens 4 1.639 1.45 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 16 Aspheric Coefficients Surface # 1 2 4 5 k = −1.1773E+00  4.2787E+00  1.4436E+01 −1.6411E−02 A4 = 2.0869E−01 −9.8939E−02−5.5609E−01 −2.3617E−01 A6 = 1.0093E−01 −1.6956E−01 −1.1558E+00 1.5467E−01 A8 = 1.9955E−01 −4.9746E+00 −1.9035E−02 −6.1069E+00 A10 =−5.5220E+01  2.7565E+01 A12 = −4.7288E+01 A14 =  2.9985E+01 Surface # 67 8 9 k = −2.0087E+00 −1.0909E+00 −5.3036E+00 −1.3323E+00 A4 =−1.8137E−01  2.0326E−01  3.6630E−02 −4.0908E−02 A6 = −3.4733E+00−9.9821E−01 −3.8820E−02 −2.4040E−02 A8 =  1.4158E+01  2.6426E+00−2.5734E−02 −4.7867E−02 A10 = −1.8049E+01 −2.9200E+00  3.7060E−02 7.1935E−02 A12 =  9.0815E+00  1.2296E+00 −1.3734E−02 −3.5434E−02 A14 =−1.2211E+00  5.6570E−03

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 15A, Table 15Band Table 16 as the following values and satisfy the followingconditions:

8th Embodiment f [mm] 1.82 CT2/CT4 0.92 Fno 2.00 TD [mm] 2.89 HFOV[deg.] 35.0 TL/IH 2.93 Nd1 1.660 R1/R2 0.83 Vd1 20.4 R2/R7 1.70 Vd1/Vd20.87 R2/fd 0.75 Vd1/Vd3 1.00 R8/fd 1.64 Vd1/Vd4 0.87 fd/fd3 −1.13 Vd223.5 |fd/fd3| + |fd/fd4| 2.34 Vd3 20.4 max(|fd/fd3|, |fd/fd4|) 1.22 Vd423.5 (|1/fd1| + |1/fd2|)/ 0.57 ΣVd 87.8 (|1/fd3| + |1/fd4|) CT1/T12 1.77SL/TL 0.81

9th Embodiment

FIG. 17 is a schematic view of an electronic device according to the 9thembodiment of the present disclosure. FIG. 18 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the electronicdevice according to the 9th embodiment. In FIG. 17, the electronicdevice includes an optical lens assembly (its reference numeral isomitted), wherein the optical lens assembly includes, in order from anoutside to an inside, an aperture stop 900, a first lens element 910, asecond lens element 920, a third lens element 930, a fourth lens element940, a filter 950 and an inside conjugation surface 960. The opticallens assembly includes four lens elements (910, 920, 930 and 940)without additional one or more lens elements inserted between the firstlens element 910 and the fourth lens element 940.

The first lens element 910 with positive refractive power has an outsidesurface 911 being convex in a paraxial region thereof and an insidesurface 912 being concave in a paraxial region thereof. The first lenselement 910 is made of a glass material, and has the outside surface 911and the inside surface 912 being both aspheric.

The second lens element 920 with positive refractive power has anoutside surface 921 being convex in a paraxial region thereof and aninside surface 922 being convex in a paraxial region thereof. The secondlens element 920 is made of a plastic material, and has the outsidesurface 921 and the inside surface 922 being both aspheric.

The third lens element 930 with positive refractive power has an outsidesurface 931 being concave in a paraxial region thereof and an insidesurface 932 being convex in a paraxial region thereof. The third lenselement 930 is made of a plastic material, and has the outside surface931 and the inside surface 932 being both aspheric.

The fourth lens element 940 with negative refractive power has anoutside surface 941 being convex in a paraxial region thereof and aninside surface 942 being concave in a paraxial region thereof. Thefourth lens element 940 is made of a plastic material, and has theoutside surface 941 and the inside surface 942 being both aspheric.Furthermore, each of the outside surface 941 and the inside surface 942of the fourth lens element 940 includes at least one critical point inan off-axis region thereof.

The filter 950 is made of a glass material and located between thefourth lens element 940 and the inside conjugation surface 960, and willnot affect the focal length of the optical lens assembly.

The detailed optical data of the 9th embodiment are shown in Tables 17Aand 17B, and the aspheric surface data are shown in Table 18 below.

TABLE 17A 9th Embodiment f = 2.41 mm, Fno = 1.51, HFOV = 43.2 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano Infinity conjugation surface  1 Ape. Stop Plano −0.228 2 Lens 1 1.436 ASP 0.505 Glass 1.704 29.2 3.67  3 2.759 ASP 0.318  4Lens 2 203.542 ASP 0.380 Plastic 1.637 20.4 9.52  5 −6.252 ASP 0.248  6Lens 3 −1.025 ASP 0.525 Plastic 1.619 23.3 3.06  7 −0.795 ASP 0.010  8Lens 4 1.384 ASP 0.428 Plastic 1.629 21.8 −4.47  9 0.817 ASP 0.500 10Filter Plano 0.080 Glass 1.510 64.2 — 11 Plano 0.493 12 Inside Plano —conjugation surface Reference wavelength is 850.0 nm. Effective radiusof Surface 5 is 0.850 mm

TABLE 17B 9th Embodiment fd = 2.33 mm Surface # Index Focal Length 0Outside conjugation surface 1 Ape. Stop 2 Lens 1 1.722 3.57 3 4 Lens 21.660 9.20 5 6 Lens 3 1.639 2.94 7 8 Lens 4 1.650 −4.37 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 18 Aspheric Coefficients Surface # 2 3 4 5 k = −1.3343E+00 6.3565E+00 −8.9972E+01 −4.8494E+01 A4 =  3.5787E−02 −4.9881E−02−3.0267E−01 −9.6327E−02 A6 =  1.7787E−01 −4.0814E−01  6.2513E−01−9.2262E−01 A8 = −6.5441E−01  1.5443E+00 −6.3569E+00  3.3913E+00 A10 = 1.0055E+00 −5.2769E+00  2.5668E+01 −8.7653E+00 A12 = −5.4588E−01 8.1632E+00 −6.5289E+01  1.2365E+01 A14 = −1.7034E−01 −6.6066E+00 8.7135E+01 −7.0062E+00 A16 =  2.2806E+00 −4.4184E+01  1.0664E+00Surface # 6 7 8 9 k = 1.1219E−01 −6.1301E+00 −7.0290E−01 −5.2049E+00 A4= 5.4399E−01 −9.7256E−01 −5.8326E−01 −2.3673E−01 A6 = −2.5780E+00  2.7659E+00  5.7715E−01  2.0545E−01 A8 = 8.7026E+00 −6.3750E+00−4.0796E−01 −1.2917E−01 A10 = −1.8769E+01   9.7826E+00  1.8578E−01 5.1537E−02 A12 = 2.8770E+01 −8.3215E+00 −5.1432E−02 −1.2748E−02 A14 =−2.4759E+01   3.5985E+00  7.8871E−03  1.7819E−03 A16 = 8.7402E+00−6.2474E−01 −5.1549E−04 −1.0640E−04

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 9th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 17A, Table 17Band Table 18 as the following values and satisfy the followingconditions:

9th Embodiment f [mm] 2.41 CT2/CT4 0.89 Fno 1.51 TD [mm] 2.41 HFOV[deg.] 43.2 TL/IH 1.52 Nd1 1.722 R1/R2 0.52 Vd1 29.2 R2/R7 1.99 Vd1/Vd21.43 R2/fd 1.18 Vd1/Vd3 1.26 R8/fd 0.35 Vd1/Vd4 1.34 fd/fd3 0.79 Vd220.4 |fd/fd3| + |fd/fd4| 1.33 Vd3 23.3 max(|fd/fd3|, |fd/fd4|) 0.79 Vd421.8 (|1/fd1| + |1/fd2|)/ 0.68 ΣVd 94.7 (|1/fd3| + |1/fd4|) CT1/T12 1.59SL/TL 0.93

10th Embodiment

FIG. 19 is a schematic view of an electronic device according to the10th embodiment of the present disclosure. FIG. 20 shows sphericalaberration curves, astigmatic field curves and a distortion curve of theelectronic device according to the 10th embodiment. In FIG. 19, theelectronic device includes an optical lens assembly (its referencenumeral is omitted), wherein the optical lens assembly includes, inorder from an outside to an inside, an aperture stop 1000, a first lenselement 1010, a second lens element 1020, a third lens element 1030, afourth lens element 1040, a filter 1050 and an inside conjugationsurface 1060. The optical lens assembly includes four lens elements(1010, 1020, 1030 and 1040) without additional one or more lens elementsinserted between the first lens element 1010 and the fourth lens element1040.

The first lens element 1010 with positive refractive power has anoutside surface 1011 being convex in a paraxial region thereof and aninside surface 1012 being concave in a paraxial region thereof. Thefirst lens element 1010 is made of a plastic material, and has theoutside surface 1011 and the inside surface 1012 being both aspheric.

The second lens element 1020 with positive refractive power has anoutside surface 1021 being concave in a paraxial region thereof and aninside surface 1022 being convex in a paraxial region thereof. Thesecond lens element 1020 is made of a plastic material, and has theoutside surface 1021 and the inside surface 1022 being both aspheric.

The third lens element 1030 with positive refractive power has anoutside surface 1031 being concave in a paraxial region thereof and aninside surface 1032 being convex in a paraxial region thereof. The thirdlens element 1030 is made of a plastic material, and has the outsidesurface 1031 and the inside surface 1032 being both aspheric.

The fourth lens element 1040 with negative refractive power has anoutside surface 1041 being convex in a paraxial region thereof and aninside surface 1042 being concave in a paraxial region thereof. Thefourth lens element 1040 is made of a plastic material, and has theoutside surface 1041 and the inside surface 1042 being both aspheric.Furthermore, each of the outside surface 1041 and the inside surface1042 of the fourth lens element 1040 includes at least one criticalpoint in an off-axis region thereof.

The filter 1050 is made of a glass material and located between thefourth lens element 1040 and the inside conjugation surface 1060, andwill not affect the focal length of the optical lens assembly.

The detailed optical data of the 10th embodiment are shown in Table 19,and the aspheric surface data are shown in Table 20 below.

TABLE 19 10th Embodiment f = 2.36 mm, Fno = 1.80, HFOV = 43.4 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano Infinity conjugation surface  1 Ape. Stop Plano −0.156 2 Lens 1 1.350 ASP 0.542 Plastic 1.584 28.2 3.32  3 3.785 ASP 0.328  4Lens 2 −16.605 ASP 0.278 Plastic 1.656 21.3 13.10  5 −5.700 ASP 0.249  6Lens 3 −1.013 ASP 0.380 Plastic 1.582 30.2 3.09  7 −0.738 ASP 0.182  8Lens 4 1.467 ASP 0.418 Plastic 1.688 18.7 −3.11  9 0.769 ASP 0.500 10Filter Plano 0.210 Glass 1.517 64.2 — 11 Plano 0.240 12 Inside Plano —conjugation surface Reference wavelength is 587.6 nm (d-line). Effectiveradius of Surface 5 is 0.820 mm.

TABLE 20 Aspheric Coefficients Surface # 2 3 4 5 k = −1.5044E+00 1.0265E+01 −9.0000E+01 −3.2215E+01 A4 = −1.3187E−01  3.4223E−02−5.6092E−01 −1.7913E−01 A6 =  2.1246E+00 −2.0348E+00  2.1196E+00−9.4201E−01 A8 = −1.2215E+01  1.0753E+01 −1.7129E+01  6.7388E+00 A10 = 3.6256E+01 −3.4036E+01  6.8427E+01 −2.7628E+01 A12 = −5.4434E+01 5.0385E+01 −1.8863E+02  5.4795E+01 A14 =  3.2161E+01 −2.5618E+01 2.9953E+02 −4.9509E+01 A16 = −4.8799E+00 −1.8799E+02  1.7088E+01Surface # 6 7 8 9 k = 9.5516E−02 −5.5201E+00 −6.7958E−01 −4.3677E+00 A4= 6.6544E−01 −1.2236E+00 −6.3155E−01 −2.9848E−01 A6 = −3.3468E+00  4.0302E+00  5.2657E−01  2.8322E−01 A8 = 1.2778E+01 −1.1278E+01−2.9289E−01 −1.8577E−01 A10 = −2.9710E+01   1.9944E+01  1.0103E−01 7.8158E−02 A12 = 4.5635E+01 −1.8696E+01 −1.9624E−02 −1.9985E−02 A14 =−3.9054E+01   8.5520E+00  1.8249E−03  2.7788E−03 A16 = 1.3730E+01−1.5038E+00 −5.0883E−05 −1.5954E−04

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 10th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 19 and Table 20as the following values and satisfy the following conditions:

10th Embodiment f [mm] 2.36 CT2/CT4 0.67 Fno 1.80 TD [mm] 2.38 HFOV[deg.] 43.4 TL/IH 1.47 Nd1 1.584 R1/R2 0.36 Vd1 28.2 R2/R7 2.58 Vd1/Vd21.33 R2/fd 1.60 Vd1/Vd3 0.93 R8/fd 0.33 Vd1/Vd4 1.51 fd/fd3 0.76 Vd221.3 |fd/fd3| + |fd/fd4| 1.52 Vd3 30.2 max(|fd/fd3|, |fd/fd4|) 0.76 Vd418.7 (|1/fd1| + |1/fd2|)/ 0.59 ΣVd 98.4 (|1/fd3| + |1/fd4|) CT1/T12 1.65SL/TL 0.95

11th Embodiment

FIG. 21 is a schematic view of an electronic device according to the11th embodiment of the present disclosure. FIG. 22 shows sphericalaberration curves, astigmatic field curves and a distortion curve of theelectronic device according to the 11th embodiment. In FIG. 21, theelectronic device includes an optical lens assembly (its referencenumeral is omitted), wherein the optical lens assembly includes, inorder from an outside to an inside, an aperture stop 1100, a first lenselement 1110, a second lens element 1120, a third lens element 1130, afourth lens element 1140, a filter 1150 and an inside conjugationsurface 1160. The optical lens assembly includes four lens elements(1110, 1120, 1130 and 1140) without additional one or more lens elementsinserted between the first lens element 1110 and the fourth lens element1140.

The first lens element 1110 with positive refractive power has anoutside surface 1111 being convex in a paraxial region thereof and aninside surface 1112 being concave in a paraxial region thereof. Thefirst lens element 1110 is made of a plastic material, and has theoutside surface 1111 and the inside surface 1112 being both aspheric.

The second lens element 1120 with positive refractive power has anoutside surface 1121 being concave in a paraxial region thereof and aninside surface 1122 being convex in a paraxial region thereof. Thesecond lens element 1120 is made of a plastic material, and has theoutside surface 1121 and the inside surface 1122 being both aspheric.

The third lens element 1130 with positive refractive power has anoutside surface 1131 being concave in a paraxial region thereof and aninside surface 1132 being convex in a paraxial region thereof. The thirdlens element 1130 is made of a plastic material, and has the outsidesurface 1131 and the inside surface 1132 being both aspheric.

The fourth lens element 1140 with negative refractive power has anoutside surface 1141 being convex in a paraxial region thereof and aninside surface 1142 being concave in a paraxial region thereof. Thefourth lens element 1140 is made of a plastic material, and has theoutside surface 1141 and the inside surface 1142 being both aspheric.Furthermore, each of the outside surface 1141 and the inside surface1142 of the fourth lens element 1140 includes at least one criticalpoint in an off-axis region thereof.

The filter 1150 is made of a glass material and located between thefourth lens element 1140 and the inside conjugation surface 1160, andwill not affect the focal length of the optical lens assembly.

The detailed optical data of the 11th embodiment are shown in Tables 21Aand 21B, and the aspheric surface data are shown in Table 22 below.

TABLE 21A 11th Embodiment f = 2.41 mm, Fno = 1.53, HFOV = 42.5 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 600.000 conjugation surface  1 Ape. Stop Plano −0.257 2 Lens 1 1.317 ASP 0.513 Plastic 1.634 20.4 3.48  3 2.778 ASP 0.362  4Lens 2 −28.731 ASP 0.299 Plastic 1.634 20.4 11.77  5 −5.946 ASP 0.243  6Lens 3 −1.020 ASP 0.487 Plastic 1.634 20.4 3.05  7 −0.791 ASP 0.030  8Lens 4 1.381 ASP 0.405 Plastic 1.634 20.4 −4.42  9 0.820 ASP 0.500 10Filter Plano 0.300 Glass 1.508 64.2 — 11 Plano 0.350 12 Inside Plano —conjugation surface Reference wavelength is 940.0 nm. Effective radiusof Surface 5 is 0.820 mm.

TABLE 21B 11th Embodiment fd = 2.31 mm Surface # Index Focal Length 0Outside conjugation surface 1 Ape. Stop 2 Lens 1 1.660 3.33 3 4 Lens 21.660 11.30 5 6 Lens 3 1.660 2.90 7 8 Lens 4 1.660 −4.29 9 10 Filter1.517 — 11 12 Inside conjugation surface Reference wavelength is 587.6nm (d-line).

TABLE 22 Aspheric Coefficients Surface # 2 3 4 5 k = −1.0753E+00 9.7802E+00  6.3171E+01  3.7325E+00 A4 =  5.4959E−02 −3.9630E−02−3.6536E−01 −1.9598E−01 A6 =  1.0492E−01 −4.5565E−01  5.7047E−01−5.6492E−01 A8 = −1.9484E−01  1.0801E+00 −7.7681E+00  1.0803E+00 A10 =−2.6211E−01 −1.3355E+00  3.6161E+01 −2.0683E+00 A12 =  1.2488E+00−4.6404E+00 −1.0187E+02  2.6479E+00 A14 = −1.1864E+00  1.1437E+01 1.4684E+02  5.8189E−01 A16 = −7.6701E+00 −7.9522E+01 −1.2110E+00Surface # 6 7 8 9 k = 1.1229E−01 −6.3936E+00 −7.0024E−01 −5.1268E+00 A4= 3.3200E−01 −1.0902E+00 −5.8244E−01 −2.4265E−01 A6 = −1.0344E+00  3.3258E+00  5.5162E−01  2.1541E−01 A8 = 7.8602E−01 −8.3756E+00−3.7434E−01 −1.4747E−01 A10 = 3.5442E+00  1.3896E+01  1.6127E−01 6.6425E−02 A12 = −3.5166E+00  −1.2822E+01 −4.1668E−02 −1.9002E−02 A14 =−2.0857E+00   6.0361E+00  5.9602E−03  3.0844E−03 A16 = 2.6553E+00−1.1414E+00 −3.6815E−04 −2.1130E−04

In the 11th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 11th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 21A, Table 21 Band Table 22 as the following values and satisfy the followingconditions:

11th Embodiment f [mm] 2.41 CT2/CT4 0.74 Fno 1.53 TD [mm] 2.34 HFOV[deg.] 42.5 TL/IH 1.54 Nd1 1.660 R1/R2 0.47 Vd1 20.4 R2/R7 2.01 Vd1/Vd21.00 R2/fd 1.20 Vd1/Vd3 1.00 R8/fd 0.36 Vd1/Vd4 1.00 fd/fd3 0.80 Vd220.4 |fd/fd3| + |fd/fd4| 1.33 Vd3 20.4 max(|fd/fd3|, |fd/fd4|) 0.80 Vd420.4 (|1/fd1| + |1/fd2|)/ 0.67 ΣVd 81.6 (|1/fd3| + |1/fd4|) CT1/T12 1.42SL/TL 0.93

12th Embodiment

FIG. 23 is a schematic view of an electronic device according to the12th embodiment of the present disclosure. FIG. 24 shows sphericalaberration curves, astigmatic field curves and a distortion curve of theelectronic device according to the 12th embodiment. In FIG. 23, theelectronic device includes an optical lens assembly (its referencenumeral is omitted), wherein the optical lens assembly includes, inorder from an outside to an inside, a first lens element 1210, anaperture stop 1200, a second lens element 1220, a third lens element1230, a fourth lens element 1240 and an inside conjugation surface 1260.The optical lens assembly includes four lens elements (1210, 1220, 1230and 1240) without additional one or more lens elements inserted betweenthe first lens element 1210 and the fourth lens element 1240.

The first lens element 1210 with negative refractive power has anoutside surface 1211 being convex in a paraxial region thereof and aninside surface 1212 being concave in a paraxial region thereof. Thefirst lens element 1210 is made of a plastic material, and has theoutside surface 1211 and the inside surface 1212 being both aspheric.

The second lens element 1220 with positive refractive power has anoutside surface 1221 being concave in a paraxial region thereof and aninside surface 1222 being convex in a paraxial region thereof. Thesecond lens element 1220 is made of a plastic material, and has theoutside surface 1221 and the inside surface 1222 being both aspheric.

The third lens element 1230 with negative refractive power has anoutside surface 1231 being concave in a paraxial region thereof and aninside surface 1232 being convex in a paraxial region thereof. The thirdlens element 1230 is made of a plastic material, and has the outsidesurface 1231 and the inside surface 1232 being both aspheric.

The fourth lens element 1240 with positive refractive power has anoutside surface 1241 being convex in a paraxial region thereof and aninside surface 1242 being convex in a paraxial region thereof. Thefourth lens element 1240 is made of a plastic material, and has theoutside surface 1241 and the inside surface 1242 being both aspheric.Furthermore, the inside surface 1242 of the fourth lens element 1240includes at least one critical point in an off-axis region thereof.

The detailed optical data of the 12th embodiment are shown in Tables 23Aand 23B, and the aspheric surface data are shown in Table 24 below.

TABLE 23A 12th Embodiment f = 1.03 mm, Fno = 1.60, HFOV = 42.5 deg.Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Outside Plano 600.000 conjugation surface  1 Lens 1 1.422 ASP 0.846Plastic 1.618 22.5 −5.27  2 0.765 ASP 0.222  3 Ape. Stop Plano 0.049  4Lens 2 −7.695 ASP 0.560 Plastic 1.618 22.6 0.78  5 −0.466 ASP 0.135  6Lens 3 −0.271 ASP 0.353 Plastic 1.634 20.4 −0.90  7 −0.776 ASP 0.030  8Lens 4 0.510 ASP 0.759 Plastic 1.535 56.0 0.93  9 −8.998 ASP 0.535 10Inside Plano — conjugation surface Reference wavelength is 940.0 nm.

TABLE 23B 12th Embodiment fd = 1.01 mm Surface # Index Focal Length 0Outside conjugation surface 1 Lens 1 1.642 −5.19 2 3 Ape. Stop 4 Lens 21.642 0.75 5 6 Lens 3 1.660 −0.87 7 8 Lens 4 1.544 0.91 9 10 Insideconjugation surface Reference wavelength is 587.6 nm (d-line).

TABLE 24 Aspheric Coefficients Surface # 1 2 4 5 k = −7.4869E+00−4.7587E−01 9.9000E+01 −7.4153E−01 A4 =  4.2236E−01  5.9226E−01−1.4291E+00   1.6574E+00 A6 = −2.7562E−01  4.2114E+00 1.4924E+01−1.1222E+01 A8 =  2.5050E−01 −2.3869E+01 −2.7186E+02   4.5152E+01 A10 =1.1921E+03 −7.4246E+01 A12 = −1.0727E+02 A14 =  3.4937E+02 Surface # 6 78 9 k = −2.5394E+00 −4.5848E−01 −5.3201E+00  3.5645E+01 A4 =  4.5493E−01−2.2310E−01  5.9458E−01  6.1050E−01 A6 = −1.7076E+01  5.2812E−01−2.3503E+00 −1.1581E+00 A8 =  1.0074E+02 −1.0538E+01  3.6851E+00−2.1566E+00 A10 = −2.4822E+02  4.2676E+01 −2.6567E+00  9.2076E+00 A12 = 3.0275E+02 −6.4731E+01  7.2622E−01 −1.1452E+01 A14 = −1.5186E+02 3.6523E+01  6.2329E+00 A16 = −1.2626E+00

In the 12th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 12th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 23A, Table 23Band Table 24 as the following values and satisfy the followingconditions:

12th Embodiment f [mm] 1.03 CT2/CT4 0.74 Fno 1.50 TD [mm] 2.95 HFOV[deg.] 42.5 TL/IH 3.49 Nd1 1.642 R1/R2 1.86 Vd1 22.5 R2/R7 1.50 Vd1/Vd21.00 R2/fd 0.75 Vd1/Vd3 1.10 R8/fd −8.87 Vd1/Vd4 0.40 fd/fd3 −1.16 Vd222.5 |fd/fd3| + |fd/fd4| 2.27 Vd3 20.4 max(|fd/fd3|, |fd/fd4|) 1.16 Vd456.0 (|1/fd1| + |1/fd2|)/ 0.68 ΣVd 121.4 (|1/fd3| + |1/fd4|) CT1/T123.12 SL/TL 0.69

13th Embodiment

FIG. 26A is a schematic view of a sensing module 1300 of an electronicdevice 10 according to the 13th embodiment of the present disclosure.FIG. 26B is a schematic view of an appearance of one side of theelectronic device 10 according to the 13th embodiment of the presentdisclosure. FIG. 26C is a schematic view of an appearance of the otherside of the electronic device 10 according to the 13th embodiment of thepresent disclosure. In FIGS. 26A, 26B and 26C, the electronic device 10according to the 13th embodiment is a tablet, which includes the sensingmodule 1300, an image capturing apparatus 11 and a display apparatus 12.

The sensing module 1300 includes a projection apparatus 1310, areceiving apparatus 1320 and a processor 1330, wherein the projectionapparatus 1310 and the receiving apparatus 1320 are connected to theprocessor 1330. The projection apparatus 1310 includes the optical lensassembly (its reference numeral is omitted) according to theaforementioned 12th embodiment and at least one light source 1311,wherein the optical lens assembly includes, in order from an outside toan inside (that is, from a magnification side to a reduction side of theprojection apparatus 1310), the first lens element 1210, the aperturestop 1200, the second lens element 1220, the third lens element 1230,the fourth lens element 1240 and the inside conjugation surface 1260,and the light source 1311 can be composed by a laser array, and can bevertical cavity surface emitting laser, which is disposed on the insideconjugation surface 1260 of the optical lens assembly. The receivingapparatus 1320 includes the optical lens assembly (its reference numeralis omitted) according to the aforementioned 11th embodiment and an imagesensor 1321, wherein the optical lens assembly includes, in order froman outside to an inside (that is, from an object side to an image sideof the receiving apparatus 1320), the aperture stop 1100, the first lenselement 1110, the second lens element 1120, the third lens element 1130,the fourth lens element 1140, the filter 1150 and the inside conjugationsurface 1160, and the image sensor 1321 is disposed on the insideconjugation surface 1160 of the optical lens assembly.

The light of the light source 1311 of the projection apparatus 1310passes through the optical lens assembly thereof so as to form into astructured light and project on a sensed object 13 a. The receivingapparatus 1320 receives the reflective light from the sensed object 13a, images on the image sensor 1321, and the received information can becalculated by the processor 1330 so as to obtain the relative distanceof each portion of the sensed object 13 a, further obtain the 3D-shapedvariation on the surface of the sensed object 13 a.

In the 13th embodiment, the projection apparatus 1310 and the receivingapparatus 1320 (including the optical lens assemblies, the light source1311 and the image sensor 1321) can be applied to the infrared band (780nm-1500 nm) so as to decrease the interference from the visible lightand enhance the sensing precision. In the 13th embodiment, theprojection apparatus 1310 and the receiving apparatus 1320 can befurther applied to the narrow-band infrared (930 nm-950 nm) so as todecrease the noise interference.

The image capturing apparatus 11 includes the optical lens assembly (itsreference numeral is omitted) according to the aforementioned 10thembodiment and an image sensor (its reference numeral is omitted)disposed on the inside conjugation surface 1060, wherein the imagecapturing apparatus 11 can be applied to the visible light (400 nm-700nm).

The sensed object 13 a can include the surrounding environment, thesensing module 1300 can be matched with the image capturing apparatus 11and the display apparatus 12 so as to apply but not limited to theaugmented reality function, so that users can interact with thesurrounding environment.

Furthermore, in the 13th embodiment, the projection apparatus 1310includes the optical lens assembly according to the aforementioned 12thembodiment and the receiving apparatus 1320 includes the optical lensassembly according to the aforementioned 11th embodiment, but thepresent disclosure will not be limited thereto. The projection apparatus1310 and the receiving apparatus 1320 can include other optical lensassembly, such as, the projection apparatus 1310 can include the opticallens assembly according to the aforementioned 3rd embodiment, and thereceiving apparatus 1320 can include the optical lens assembly accordingto the aforementioned 2nd embodiment, and will not detailed describeherein.

14th Embodiment

FIG. 27A is a schematic view of an appearance of the using state of anelectronic device 20 according to the 14th embodiment of the presentdisclosure. FIG. 27B is a schematic view of a sensing module 1400 of theelectronic device 20 according to the 14th embodiment of the presentdisclosure. According to the 14th embodiment, the electronic device 20is a smartphone, which includes the sensing module 1400, an imagecapturing apparatus 21 and a display apparatus 22.

The sensing module 1400 includes a projection apparatus 1410, areceiving apparatus 1420 and a processor 1430, wherein the projectionapparatus 1410 and the receiving apparatus 1420 are connected to theprocessor 1430. According to the 14th embodiment, the projectionapparatus 1410 includes an optical lens assembly 1411 and a light source1412, the receiving apparatus 1420 includes an optical lens assembly1421 and an image sensor 1422, wherein the connecting relationship andfunctions of the projection apparatus 1410, the receiving apparatus 1420and the processor 1430 can be the same with the projection apparatus1310, the receiving apparatus 1320 and the processor 1330 stated in the13th embodiment, and will not describe again herein.

The sensing module 1400 can be applied to face recognition function, inFIG. 27B, the light source 1412 can be composed by a laser array 1412 a,which can form structured light with the optical lens assembly 1411 ofthe projection apparatus 1410, and project on an sensed object 14 a,wherein the sensed object 14 a is shown without an array image ofprojection, and the sensed object 14 b is shown with an array image ofprojection. The optical lens assembly 1421 of the receiving apparatus1420 receives the reflective light from the sensed object 14 b, imageson the image sensor 1422, and the received image 1422 a can becalculated by the processor 1430 so as to obtain the relative distanceof each portion of the sensed object 14 b, further obtain the 3D-shapedvariation on the surface of the sensed object 14 b. Therefore, thesecurity of the electronic device 20 in usage can be enhanced, but isnot limited thereto. The image capturing apparatus 21 can be utilized tophotographing, and can be matched to the sensing module 1400, whereinthe obtained information of the receiving apparatus 1420 and the imagecapturing apparatus 21 can be shown on the display apparatus 22 afterprocessing.

15th Embodiment

FIG. 28 is a schematic view of an electronic device 30 according to the15th embodiment of the present disclosure. In the 15th embodiment, theelectronic device 30 includes a sensing module (its reference numeral isomitted), an image capturing apparatus 31 and a display apparatus 32.

The sensing module includes a projection apparatus 1510, a receivingapparatus 1520 and a processor 1530, wherein the projection apparatus1510 and the receiving apparatus 1520 are connected to the processor1530. According to the 15th embodiment, the connecting relationship andfunctions of the projection apparatus 1510, the receiving apparatus 1520and the processor 1530 can be the same with the projection apparatus1310, the receiving apparatus 1320 and the processor 1330 stated in the13th embodiment, and will not describe again herein.

According to the 15th embodiment, the sensing module can be utilized tocapture the dynamic variation of the sensed object 33 so as to implementhuman-computer interaction, but is not limited thereto. The imagecapturing apparatus 31 can be utilized to photographing, and can bematched to the sensing module, wherein the obtained information of thereceiving apparatus 1520 and the image capturing apparatus 31 can beshown on the display apparatus 32 after processing.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTables show different data of the different embodiments; however, thedata of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An electronic device, comprising at least oneoptical lens assembly, which comprises four lens elements, the four lenselements being in order from an outside to an inside: a first lenselement, a second lens element, a third lens element and a fourth lenselement; wherein the first lens element has an outside surface beingconvex in a paraxial region thereof; the third lens element has positiverefractive power; the fourth lens element has an inside surface beingconcave in a paraxial region thereof, wherein at least one of an outsidesurface and the inside surface of the fourth lens element comprises atleast one critical point in an off-axis region thereof; wherein, when ameasurement is made in accordance with a reference wavelength as ad-line, an Abbe number of the first lens element is Vd1, an Abbe numberof the second lens element is Vd2, an Abbe number of the third lenselement is Vd3, an Abbe number of the fourth lens element is Vd4, anf-number of the optical lens assembly is Fno, and the followingconditions are satisfied:0.65<Vd1/Vd2<1.54;0.65<Vd1/Vd3<1.54;0.65<Vd1/Vd4<1.54;10.0<Vd1<38.0; and1.0<Fno<2.3.
 2. The electronic device of claim 1, wherein when themeasurement is made in accordance with the reference wavelength as thed-line, the Abbe number of the first lens element is Vd1, the Abbenumber of the second lens element is Vd2, the Abbe number of the thirdlens element is Vd3, the Abbe number of the fourth lens element is Vd4,and the following conditions are satisfied:0.75<Vd1/Vd2<1.35;0.75<Vd1/Vd3<1.35; and0.75<Vd1/Vd4<1.35.
 3. The electronic device of claim 1, wherein themeasurement is made in accordance with the reference wavelength as thed-line, the Abbe number of the first lens element is Vd1, a sum of theAbbe numbers of the first lens element, the second lens element, thethird lens element and the fourth lens element is ΣVd, and the followingconditions are satisfied:14.0<Vd1<30.0; and50.0<ΣVd<100.0.
 4. The electronic device of claim 1, wherein an axialdistance between the outside surface of the first lens element and aninside conjugation surface of the optical lens assembly is TL, a maximumradius of an optical effective region of the inside conjugation surfaceof the optical lens assembly is IH, a half of a maximum field of view ofthe optical lens assembly is HFOV, and the following conditions aresatisfied:1.0<TL/IH<4.0; and30 degrees<HFOV<50 degrees.
 5. The electronic device of claim 1, whereinwhen the measurement is made in accordance with the reference wavelengthas the d-line, a focal length of the first lens element is fd1, a focallength of the second lens element is fd2, the focal length of the thirdlens element is fd3, a focal length of the fourth lens element is fd4,and the following condition is satisfied:0.38<(|1/fd1|+|1/fd2|)/(|1/fd3|+|1/fd4|)<1.5.
 6. The electronic deviceof claim 1, wherein the first lens element has positive refractivepower; the third lens element has an outside surface being concave in aparaxial region thereof and an inside surface being convex in a paraxialregion thereof; the outside surface of the fourth lens element is convexin a paraxial region thereof and comprises at least one critical pointin an off-axis region thereof.
 7. The electronic device of claim 1,wherein the first lens element has an inside surface being concave in aparaxial region thereof; a curvature radius of the outside surface ofthe first lens element is R1, a curvature radius of the inside surfaceof the first lens element is R2, and the following condition issatisfied:0.32<R1/R2<1.64.
 8. The electronic device of claim 1, wherein theoptical lens assembly is applied to an infrared band within a wavelengthranged from 780 nm to 1500 nm.
 9. An electronic device, comprising atleast one optical lens assembly, which comprises four lens elements, thefour lens elements being in order from an outside to an inside: a firstlens element, a second lens element, a third lens element and a fourthlens element; wherein the first lens element has an outside surfacebeing convex in a paraxial region thereof; the third lens element haspositive refractive power; the fourth lens element has an inside surfacebeing concave in a paraxial region thereof, wherein at least one of anoutside surface and the inside surface of the fourth lens elementcomprises at least one critical point in an off-axis region thereof;wherein, when a measurement is made in accordance with a referencewavelength as a d-line, an Abbe number of the first lens element is Vd1,an Abbe number of the second lens element is Vd2, an Abbe number of thethird lens element is Vd3, an Abbe number of the fourth lens element isVd4, a sum of the Abbe numbers of the first lens element, the secondlens element, the third lens element and the fourth lens element is ΣVd,and the following conditions are satisfied:0.65<Vd1/Vd2<1.54;0.65<Vd1/Vd3<1.54;0.65<Vd1/Vd4<1.54;10.0<Vd1<34.0; and45.0<ΣVd<125.0.
 10. The electronic device of claim 9, wherein when themeasurement is made in accordance with the reference wavelength as thed-line, the Abbe number of the first lens element is Vd1, the Abbenumber of the second lens element is Vd2, the Abbe number of the thirdlens element is Vd3, the Abbe number of the fourth lens element is Vd4,and the following conditions are satisfied:0.75<Vd1/Vd2<1.35;0.75<Vd1/Vd3<1.35; and0.75<Vd1/Vd4<1.35.
 11. The electronic device of claim 9, wherein themeasurement is made in accordance with the reference wavelength as thed-line, the Abbe number of the first lens element is Vd1, the sum of theAbbe numbers of the first lens element, the second lens element, thethird lens element and the fourth lens element is ΣVd, and the followingconditions are satisfied:14.0<Vd1<30.0; and50.0<ΣVd<100.0.
 12. The electronic device of claim 9, wherein anf-number of the optical lens assembly is Fno, an axial distance betweenan outside surface of one of the lens elements closest to the outsideand an inside surface of one of the lens elements closest to the insideis TD, a half of a maximum field of view of the optical lens assembly isHFOV, and the following conditions are satisfied:1.0<Fno<2.3;1 mm<TD<5 mm; and30 degrees<HFOV<50 degrees.
 13. The electronic device of claim 9,wherein the first lens element has positive refractive power; the insidesurface of the fourth lens element comprises at least one critical pointin an off-axis region thereof.
 14. The electronic device of claim 9,wherein the first lens element has an inside surface being concave in aparaxial region thereof; a curvature radius of the inside surface of thefirst lens element is R2, when the measurement is made in accordancewith the reference wavelength as the d-line, a focal length of theoptical lens assembly is fd, and the following condition is satisfied:0<R2/fd<2.0.
 15. The electronic device of claim 9, wherein the thirdlens element has an outside surface being concave in a paraxial regionthereof and an inside surface being convex in a paraxial region thereof.16. The electronic device of claim 9, wherein the optical lens assemblyis applied to an infrared band within a wavelength ranged from 780 nm to1500 nm.
 17. An electronic device, comprising at least one optical lensassembly, which comprises four lens elements, the four lens elementsbeing in order from an outside to an inside: a first lens element, asecond lens element, a third lens element and a fourth lens element;wherein the first lens element has an outside surface being convex in aparaxial region thereof; the third lens element has positive refractivepower; the fourth lens element has an inside surface being concave in aparaxial region thereof, wherein at least one of an outside surface andthe inside surface of the fourth lens element comprises at least onecritical point in an off-axis region thereof; wherein, when ameasurement is made in accordance with a reference wavelength as ad-line, an Abbe number of the first lens element is Vd1, an Abbe numberof the second lens element is Vd2, an Abbe number of the third lenselement is Vd3, an Abbe number of the fourth lens element is Vd4, acentral thickness of the first lens element is CT1, an axial distancebetween the first lens element and the second lens element is T12, andthe following conditions are satisfied:0.65<Vd1/Vd2<1.54;0.65<Vd1/Vd3<1.54;0.65<Vd1/Vd4<1.54;10.0<Vd1<30.0; and0.80<CT1/T12<3.5.
 18. The electronic device of claim 17, wherein whenthe measurement is made in accordance with the reference wavelength asthe d-line, the Abbe number of the first lens element is Vd1, the Abbenumber of the second lens element is Vd2, the Abbe number of the thirdlens element is Vd3, the Abbe number of the fourth lens element is Vd4,and the following conditions are satisfied:0.70<Vd1/Vd2<1.44;0.70<Vd1/Vd3<1.44; and0.70<Vd1/Vd4<1.44.
 19. The electronic device of claim 17, wherein acurvature radius of an inside surface of the first lens element is R2, acurvature radius of the outside surface of the fourth lens element isR7, and the following condition is satisfied:0.25<R2/R7<4.8.
 20. The electronic device of claim 17, wherein theoptical lens assembly further comprises an aperture stop disposed on anoutside of the second lens element; wherein an axial distance betweenthe aperture stop and an inside conjugation surface of the optical lensassembly is SL, an axial distance between the outside surface of thefirst lens element and the inside conjugation surface of the opticallens assembly is TL, a half of a maximum field of view of the opticallens assembly is HFOV, and the following conditions are satisfied:0.70<SL/TL<1.1; and30 degrees<HFOV<50 degrees.